net/mac80211/mlme.c

   1 /*
   2  * BSS client mode implementation
   3  * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright 2004, Instant802 Networks, Inc.
   5  * Copyright 2005, Devicescape Software, Inc.
   6  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/delay.h>
  15 #include <linux/if_ether.h>
  16 #include <linux/skbuff.h>
  17 #include <linux/if_arp.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/moduleparam.h>
  20 #include <linux/rtnetlink.h>
  21 #include <linux/pm_qos.h>
  22 #include <linux/crc32.h>
  23 #include <linux/slab.h>
  24 #include <linux/export.h>
  25 #include <net/mac80211.h>
  26 #include <asm/unaligned.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "led.h"
  32
  33 #define IEEE80211_AUTH_TIMEOUT          (HZ / 5)
  34 #define IEEE80211_AUTH_TIMEOUT_LONG     (HZ / 2)
  35 #define IEEE80211_AUTH_TIMEOUT_SHORT    (HZ / 10)
  36 #define IEEE80211_AUTH_MAX_TRIES        3
  37 #define IEEE80211_AUTH_WAIT_ASSOC       (HZ * 5)
  38 #define IEEE80211_ASSOC_TIMEOUT         (HZ / 5)
  39 #define IEEE80211_ASSOC_TIMEOUT_LONG    (HZ / 2)
  40 #define IEEE80211_ASSOC_TIMEOUT_SHORT   (HZ / 10)
  41 #define IEEE80211_ASSOC_MAX_TRIES       3
  42
  43 static int max_nullfunc_tries = 2;
  44 module_param(max_nullfunc_tries, int, 0644);
  45 MODULE_PARM_DESC(max_nullfunc_tries,
  46                  "Maximum nullfunc tx tries before disconnecting (reason 4).");
  47
  48 static int max_probe_tries = 5;
  49 module_param(max_probe_tries, int, 0644);
  50 MODULE_PARM_DESC(max_probe_tries,
  51                  "Maximum probe tries before disconnecting (reason 4).");
  52
  53 /*
  54  * Beacon loss timeout is calculated as N frames times the
  55  * advertised beacon interval.  This may need to be somewhat
  56  * higher than what hardware might detect to account for
  57  * delays in the host processing frames. But since we also
  58  * probe on beacon miss before declaring the connection lost
  59  * default to what we want.
  60  */
  61 static int beacon_loss_count = 7;
  62 module_param(beacon_loss_count, int, 0644);
  63 MODULE_PARM_DESC(beacon_loss_count,
  64                  "Number of beacon intervals before we decide beacon was lost.");
  65
  66 /*
  67  * Time the connection can be idle before we probe
  68  * it to see if we can still talk to the AP.
  69  */
  70 #define IEEE80211_CONNECTION_IDLE_TIME  (30 * HZ)
  71 /*
  72  * Time we wait for a probe response after sending
  73  * a probe request because of beacon loss or for
  74  * checking the connection still works.
  75  */
  76 static int probe_wait_ms = 500;
  77 module_param(probe_wait_ms, int, 0644);
  78 MODULE_PARM_DESC(probe_wait_ms,
  79                  "Maximum time(ms) to wait for probe response"
  80                  " before disconnecting (reason 4).");
  81
  82 /*
  83  * Weight given to the latest Beacon frame when calculating average signal
  84  * strength for Beacon frames received in the current BSS. This must be
  85  * between 1 and 15.
  86  */
  87 #define IEEE80211_SIGNAL_AVE_WEIGHT     3
  88
  89 /*
  90  * How many Beacon frames need to have been used in average signal strength
  91  * before starting to indicate signal change events.
  92  */
  93 #define IEEE80211_SIGNAL_AVE_MIN_COUNT  4
  94
  95 /*
  96  * We can have multiple work items (and connection probing)
  97  * scheduling this timer, but we need to take care to only
  98  * reschedule it when it should fire _earlier_ than it was
  99  * asked for before, or if it's not pending right now. This
 100  * function ensures that. Note that it then is required to
 101  * run this function for all timeouts after the first one
 102  * has happened -- the work that runs from this timer will
 103  * do that.
 104  */
 105 static void run_again(struct ieee80211_sub_if_data *sdata,
 106                       unsigned long timeout)
 107 {
 108         sdata_assert_lock(sdata);
 109
 110         if (!timer_pending(&sdata->u.mgd.timer) ||
 111             time_before(timeout, sdata->u.mgd.timer.expires))
 112                 mod_timer(&sdata->u.mgd.timer, timeout);
 113 }
 114
 115 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 116 {
 117         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 118                 return;
 119
 120         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 121                 return;
 122
 123         mod_timer(&sdata->u.mgd.bcn_mon_timer,
 124                   round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
 125 }
 126
 127 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
 128 {
 129         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 130
 131         if (unlikely(!sdata->u.mgd.associated))
 132                 return;
 133
 134         ifmgd->probe_send_count = 0;
 135
 136         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 137                 return;
 138
 139         mod_timer(&sdata->u.mgd.conn_mon_timer,
 140                   round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
 141 }
 142
 143 static int ecw2cw(int ecw)
 144 {
 145         return (1 << ecw) - 1;
 146 }
 147
 148 static u32
 149 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 150                              struct ieee80211_supported_band *sband,
 151                              struct ieee80211_channel *channel,
 152                              const struct ieee80211_ht_operation *ht_oper,
 153                              const struct ieee80211_vht_operation *vht_oper,
 154                              struct cfg80211_chan_def *chandef, bool tracking)
 155 {
 156         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 157         struct cfg80211_chan_def vht_chandef;
 158         u32 ht_cfreq, ret;
 159
 160         chandef->chan = channel;
 161         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 162         chandef->center_freq1 = channel->center_freq;
 163         chandef->center_freq2 = 0;
 164
 165         if (!ht_oper || !sband->ht_cap.ht_supported) {
 166                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 167                 goto out;
 168         }
 169
 170         chandef->width = NL80211_CHAN_WIDTH_20;
 171
 172         ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
 173                                                   channel->band);
 174         /* check that channel matches the right operating channel */
 175         if (!tracking && channel->center_freq != ht_cfreq) {
 176                 /*
 177                  * It's possible that some APs are confused here;
 178                  * Netgear WNDR3700 sometimes reports 4 higher than
 179                  * the actual channel in association responses, but
 180                  * since we look at probe response/beacon data here
 181                  * it should be OK.
 182                  */
 183                 sdata_info(sdata,
 184                            "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
 185                            channel->center_freq, ht_cfreq,
 186                            ht_oper->primary_chan, channel->band);
 187                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
 188                 goto out;
 189         }
 190
 191         /* check 40 MHz support, if we have it */
 192         if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
 193                 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 194                 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 195                         chandef->width = NL80211_CHAN_WIDTH_40;
 196                         chandef->center_freq1 += 10;
 197                         break;
 198                 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 199                         chandef->width = NL80211_CHAN_WIDTH_40;
 200                         chandef->center_freq1 -= 10;
 201                         break;
 202                 }
 203         } else {
 204                 /* 40 MHz (and 80 MHz) must be supported for VHT */
 205                 ret = IEEE80211_STA_DISABLE_VHT;
 206                 /* also mark 40 MHz disabled */
 207                 ret |= IEEE80211_STA_DISABLE_40MHZ;
 208                 goto out;
 209         }
 210
 211         if (!vht_oper || !sband->vht_cap.vht_supported) {
 212                 ret = IEEE80211_STA_DISABLE_VHT;
 213                 goto out;
 214         }
 215
 216         vht_chandef.chan = channel;
 217         vht_chandef.center_freq1 =
 218                 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
 219                                                channel->band);
 220         vht_chandef.center_freq2 = 0;
 221
 222         switch (vht_oper->chan_width) {
 223         case IEEE80211_VHT_CHANWIDTH_USE_HT:
 224                 vht_chandef.width = chandef->width;
 225                 vht_chandef.center_freq1 = chandef->center_freq1;
 226                 break;
 227         case IEEE80211_VHT_CHANWIDTH_80MHZ:
 228                 vht_chandef.width = NL80211_CHAN_WIDTH_80;
 229                 break;
 230         case IEEE80211_VHT_CHANWIDTH_160MHZ:
 231                 vht_chandef.width = NL80211_CHAN_WIDTH_160;
 232                 break;
 233         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
 234                 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
 235                 vht_chandef.center_freq2 =
 236                         ieee80211_channel_to_frequency(
 237                                 vht_oper->center_freq_seg2_idx,
 238                                 channel->band);
 239                 break;
 240         default:
 241                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 242                         sdata_info(sdata,
 243                                    "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
 244                                    vht_oper->chan_width);
 245                 ret = IEEE80211_STA_DISABLE_VHT;
 246                 goto out;
 247         }
 248
 249         if (!cfg80211_chandef_valid(&vht_chandef)) {
 250                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 251                         sdata_info(sdata,
 252                                    "AP VHT information is invalid, disable VHT\n");
 253                 ret = IEEE80211_STA_DISABLE_VHT;
 254                 goto out;
 255         }
 256
 257         if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
 258                 ret = 0;
 259                 goto out;
 260         }
 261
 262         if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
 263                 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 264                         sdata_info(sdata,
 265                                    "AP VHT information doesn't match HT, disable VHT\n");
 266                 ret = IEEE80211_STA_DISABLE_VHT;
 267                 goto out;
 268         }
 269
 270         *chandef = vht_chandef;
 271
 272         ret = 0;
 273
 274 out:
 275         /*
 276          * When tracking the current AP, don't do any further checks if the
 277          * new chandef is identical to the one we're currently using for the
 278          * connection. This keeps us from playing ping-pong with regulatory,
 279          * without it the following can happen (for example):
 280          *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
 281          *  - AP advertises regdom US
 282          *  - CRDA loads regdom US with 80 MHz prohibited (old database)
 283          *  - the code below detects an unsupported channel, downgrades, and
 284          *    we disconnect from the AP in the caller
 285          *  - disconnect causes CRDA to reload world regdomain and the game
 286          *    starts anew.
 287          * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
 288          *
 289          * It seems possible that there are still scenarios with CSA or real
 290          * bandwidth changes where a this could happen, but those cases are
 291          * less common and wouldn't completely prevent using the AP.
 292          */
 293         if (tracking &&
 294             cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
 295                 return ret;
 296
 297         /* don't print the message below for VHT mismatch if VHT is disabled */
 298         if (ret & IEEE80211_STA_DISABLE_VHT)
 299                 vht_chandef = *chandef;
 300
 301         /*
 302          * Ignore the DISABLED flag when we're already connected and only
 303          * tracking the APs beacon for bandwidth changes - otherwise we
 304          * might get disconnected here if we connect to an AP, update our
 305          * regulatory information based on the AP's country IE and the
 306          * information we have is wrong/outdated and disables the channel
 307          * that we're actually using for the connection to the AP.
 308          */
 309         while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
 310                                         tracking ? 0 :
 311                                                    IEEE80211_CHAN_DISABLED)) {
 312                 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 313                         ret = IEEE80211_STA_DISABLE_HT |
 314                               IEEE80211_STA_DISABLE_VHT;
 315                         break;
 316                 }
 317
 318                 ret |= ieee80211_chandef_downgrade(chandef);
 319         }
 320
 321         if (chandef->width != vht_chandef.width && !tracking)
 322                 sdata_info(sdata,
 323                            "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
 324
 325         WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
 326         return ret;
 327 }
 328
 329 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 330                                struct sta_info *sta,
 331                                const struct ieee80211_ht_operation *ht_oper,
 332                                const struct ieee80211_vht_operation *vht_oper,
 333                                const u8 *bssid, u32 *changed)
 334 {
 335         struct ieee80211_local *local = sdata->local;
 336         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 337         struct ieee80211_supported_band *sband;
 338         struct ieee80211_channel *chan;
 339         struct cfg80211_chan_def chandef;
 340         u16 ht_opmode;
 341         u32 flags;
 342         enum ieee80211_sta_rx_bandwidth new_sta_bw;
 343         int ret;
 344
 345         /* if HT was/is disabled, don't track any bandwidth changes */
 346         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
 347                 return 0;
 348
 349         /* don't check VHT if we associated as non-VHT station */
 350         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
 351                 vht_oper = NULL;
 352
 353         if (WARN_ON_ONCE(!sta))
 354                 return -EINVAL;
 355
 356         /*
 357          * if bss configuration changed store the new one -
 358          * this may be applicable even if channel is identical
 359          */
 360         ht_opmode = le16_to_cpu(ht_oper->operation_mode);
 361         if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
 362                 *changed |= BSS_CHANGED_HT;
 363                 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
 364         }
 365
 366         chan = sdata->vif.bss_conf.chandef.chan;
 367         sband = local->hw.wiphy->bands[chan->band];
 368
 369         /* calculate new channel (type) based on HT/VHT operation IEs */
 370         flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
 371                                              vht_oper, &chandef, true);
 372
 373         /*
 374          * Downgrade the new channel if we associated with restricted
 375          * capabilities. For example, if we associated as a 20 MHz STA
 376          * to a 40 MHz AP (due to regulatory, capabilities or config
 377          * reasons) then switching to a 40 MHz channel now won't do us
 378          * any good -- we couldn't use it with the AP.
 379          */
 380         if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
 381             chandef.width == NL80211_CHAN_WIDTH_80P80)
 382                 flags |= ieee80211_chandef_downgrade(&chandef);
 383         if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
 384             chandef.width == NL80211_CHAN_WIDTH_160)
 385                 flags |= ieee80211_chandef_downgrade(&chandef);
 386         if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
 387             chandef.width > NL80211_CHAN_WIDTH_20)
 388                 flags |= ieee80211_chandef_downgrade(&chandef);
 389
 390         if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
 391                 return 0;
 392
 393         sdata_info(sdata,
 394                    "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
 395                    ifmgd->bssid, chandef.chan->center_freq, chandef.width,
 396                    chandef.center_freq1, chandef.center_freq2);
 397
 398         if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 399                                       IEEE80211_STA_DISABLE_VHT |
 400                                       IEEE80211_STA_DISABLE_40MHZ |
 401                                       IEEE80211_STA_DISABLE_80P80MHZ |
 402                                       IEEE80211_STA_DISABLE_160MHZ)) ||
 403             !cfg80211_chandef_valid(&chandef)) {
 404                 sdata_info(sdata,
 405                            "AP %pM changed bandwidth in a way we can't support - disconnect\n",
 406                            ifmgd->bssid);
 407                 return -EINVAL;
 408         }
 409
 410         switch (chandef.width) {
 411         case NL80211_CHAN_WIDTH_20_NOHT:
 412         case NL80211_CHAN_WIDTH_20:
 413                 new_sta_bw = IEEE80211_STA_RX_BW_20;
 414                 break;
 415         case NL80211_CHAN_WIDTH_40:
 416                 new_sta_bw = IEEE80211_STA_RX_BW_40;
 417                 break;
 418         case NL80211_CHAN_WIDTH_80:
 419                 new_sta_bw = IEEE80211_STA_RX_BW_80;
 420                 break;
 421         case NL80211_CHAN_WIDTH_80P80:
 422         case NL80211_CHAN_WIDTH_160:
 423                 new_sta_bw = IEEE80211_STA_RX_BW_160;
 424                 break;
 425         default:
 426                 return -EINVAL;
 427         }
 428
 429         if (new_sta_bw > sta->cur_max_bandwidth)
 430                 new_sta_bw = sta->cur_max_bandwidth;
 431
 432         if (new_sta_bw < sta->sta.bandwidth) {
 433                 sta->sta.bandwidth = new_sta_bw;
 434                 rate_control_rate_update(local, sband, sta,
 435                                          IEEE80211_RC_BW_CHANGED);
 436         }
 437
 438         ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
 439         if (ret) {
 440                 sdata_info(sdata,
 441                            "AP %pM changed bandwidth to incompatible one - disconnect\n",
 442                            ifmgd->bssid);
 443                 return ret;
 444         }
 445
 446         if (new_sta_bw > sta->sta.bandwidth) {
 447                 sta->sta.bandwidth = new_sta_bw;
 448                 rate_control_rate_update(local, sband, sta,
 449                                          IEEE80211_RC_BW_CHANGED);
 450         }
 451
 452         return 0;
 453 }
 454
 455 /* frame sending functions */
 456
 457 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
 458                                 struct sk_buff *skb, u8 ap_ht_param,
 459                                 struct ieee80211_supported_band *sband,
 460                                 struct ieee80211_channel *channel,
 461                                 enum ieee80211_smps_mode smps)
 462 {
 463         u8 *pos;
 464         u32 flags = channel->flags;
 465         u16 cap;
 466         struct ieee80211_sta_ht_cap ht_cap;
 467
 468         BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
 469
 470         memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 471         ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 472
 473         /* determine capability flags */
 474         cap = ht_cap.cap;
 475
 476         switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
 477         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 478                 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
 479                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 480                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 481                 }
 482                 break;
 483         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 484                 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
 485                         cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 486                         cap &= ~IEEE80211_HT_CAP_SGI_40;
 487                 }
 488                 break;
 489         }
 490
 491         /*
 492          * If 40 MHz was disabled associate as though we weren't
 493          * capable of 40 MHz -- some broken APs will never fall
 494          * back to trying to transmit in 20 MHz.
 495          */
 496         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
 497                 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 498                 cap &= ~IEEE80211_HT_CAP_SGI_40;
 499         }
 500
 501         /* set SM PS mode properly */
 502         cap &= ~IEEE80211_HT_CAP_SM_PS;
 503         switch (smps) {
 504         case IEEE80211_SMPS_AUTOMATIC:
 505         case IEEE80211_SMPS_NUM_MODES:
 506                 WARN_ON(1);
 507         case IEEE80211_SMPS_OFF:
 508                 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 509                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 510                 break;
 511         case IEEE80211_SMPS_STATIC:
 512                 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
 513                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 514                 break;
 515         case IEEE80211_SMPS_DYNAMIC:
 516                 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
 517                         IEEE80211_HT_CAP_SM_PS_SHIFT;
 518                 break;
 519         }
 520
 521         /* reserve and fill IE */
 522         pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 523         ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
 524 }
 525
 526 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 527                                  struct sk_buff *skb,
 528                                  struct ieee80211_supported_band *sband,
 529                                  struct ieee80211_vht_cap *ap_vht_cap)
 530 {
 531         u8 *pos;
 532         u32 cap;
 533         struct ieee80211_sta_vht_cap vht_cap;
 534         u32 mask, ap_bf_sts, our_bf_sts;
 535
 536         BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
 537
 538         memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 539         ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 540
 541         /* determine capability flags */
 542         cap = vht_cap.cap;
 543
 544         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
 545                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
 546                 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 547         }
 548
 549         if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
 550                 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
 551                 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
 552         }
 553
 554         /*
 555          * Some APs apparently get confused if our capabilities are better
 556          * than theirs, so restrict what we advertise in the assoc request.
 557          */
 558         if (!(ap_vht_cap->vht_cap_info &
 559                         cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
 560                 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
 561
 562         mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
 563
 564         ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
 565         our_bf_sts = cap & mask;
 566
 567         if (ap_bf_sts < our_bf_sts) {
 568                 cap &= ~mask;
 569                 cap |= ap_bf_sts;
 570         }
 571
 572         /* reserve and fill IE */
 573         pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 574         ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
 575 }
 576
 577 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 578 {
 579         struct ieee80211_local *local = sdata->local;
 580         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 581         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
 582         struct sk_buff *skb;
 583         struct ieee80211_mgmt *mgmt;
 584         u8 *pos, qos_info;
 585         size_t offset = 0, noffset;
 586         int i, count, rates_len, supp_rates_len, shift;
 587         u16 capab;
 588         struct ieee80211_supported_band *sband;
 589         struct ieee80211_chanctx_conf *chanctx_conf;
 590         struct ieee80211_channel *chan;
 591         u32 rate_flags, rates = 0;
 592
 593         sdata_assert_lock(sdata);
 594
 595         rcu_read_lock();
 596         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 597         if (WARN_ON(!chanctx_conf)) {
 598                 rcu_read_unlock();
 599                 return;
 600         }
 601         chan = chanctx_conf->def.chan;
 602         rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
 603         rcu_read_unlock();
 604         sband = local->hw.wiphy->bands[chan->band];
 605         shift = ieee80211_vif_get_shift(&sdata->vif);
 606
 607         if (assoc_data->supp_rates_len) {
 608                 /*
 609                  * Get all rates supported by the device and the AP as
 610                  * some APs don't like getting a superset of their rates
 611                  * in the association request (e.g. D-Link DAP 1353 in
 612                  * b-only mode)...
 613                  */
 614                 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
 615                                                      assoc_data->supp_rates,
 616                                                      assoc_data->supp_rates_len,
 617                                                      &rates);
 618         } else {
 619                 /*
 620                  * In case AP not provide any supported rates information
 621                  * before association, we send information element(s) with
 622                  * all rates that we support.
 623                  */
 624                 rates_len = 0;
 625                 for (i = 0; i < sband->n_bitrates; i++) {
 626                         if ((rate_flags & sband->bitrates[i].flags)
 627                             != rate_flags)
 628                                 continue;
 629                         rates |= BIT(i);
 630                         rates_len++;
 631                 }
 632         }
 633
 634         skb = alloc_skb(local->hw.extra_tx_headroom +
 635                         sizeof(*mgmt) + /* bit too much but doesn't matter */
 636                         2 + assoc_data->ssid_len + /* SSID */
 637                         4 + rates_len + /* (extended) rates */
 638                         4 + /* power capability */
 639                         2 + 2 * sband->n_channels + /* supported channels */
 640                         2 + sizeof(struct ieee80211_ht_cap) + /* HT */
 641                         2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
 642                         assoc_data->ie_len + /* extra IEs */
 643                         9, /* WMM */
 644                         GFP_KERNEL);
 645         if (!skb)
 646                 return;
 647
 648         skb_reserve(skb, local->hw.extra_tx_headroom);
 649
 650         capab = WLAN_CAPABILITY_ESS;
 651
 652         if (sband->band == IEEE80211_BAND_2GHZ) {
 653                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
 654                         capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
 655                 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
 656                         capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
 657         }
 658
 659         if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
 660                 capab |= WLAN_CAPABILITY_PRIVACY;
 661
 662         if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
 663             (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
 664                 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 665
 666         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
 667         memset(mgmt, 0, 24);
 668         memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
 669         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 670         memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
 671
 672         if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
 673                 skb_put(skb, 10);
 674                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 675                                                   IEEE80211_STYPE_REASSOC_REQ);
 676                 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
 677                 mgmt->u.reassoc_req.listen_interval =
 678                                 cpu_to_le16(local->hw.conf.listen_interval);
 679                 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
 680                        ETH_ALEN);
 681         } else {
 682                 skb_put(skb, 4);
 683                 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 684                                                   IEEE80211_STYPE_ASSOC_REQ);
 685                 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
 686                 mgmt->u.assoc_req.listen_interval =
 687                                 cpu_to_le16(local->hw.conf.listen_interval);
 688         }
 689
 690         /* SSID */
 691         pos = skb_put(skb, 2 + assoc_data->ssid_len);
 692         *pos++ = WLAN_EID_SSID;
 693         *pos++ = assoc_data->ssid_len;
 694         memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
 695
 696         /* add all rates which were marked to be used above */
 697         supp_rates_len = rates_len;
 698         if (supp_rates_len > 8)
 699                 supp_rates_len = 8;
 700
 701         pos = skb_put(skb, supp_rates_len + 2);
 702         *pos++ = WLAN_EID_SUPP_RATES;
 703         *pos++ = supp_rates_len;
 704
 705         count = 0;
 706         for (i = 0; i < sband->n_bitrates; i++) {
 707                 if (BIT(i) & rates) {
 708                         int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 709                                                 5 * (1 << shift));
 710                         *pos++ = (u8) rate;
 711                         if (++count == 8)
 712                                 break;
 713                 }
 714         }
 715
 716         if (rates_len > count) {
 717                 pos = skb_put(skb, rates_len - count + 2);
 718                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 719                 *pos++ = rates_len - count;
 720
 721                 for (i++; i < sband->n_bitrates; i++) {
 722                         if (BIT(i) & rates) {
 723                                 int rate;
 724                                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
 725                                                     5 * (1 << shift));
 726                                 *pos++ = (u8) rate;
 727                         }
 728                 }
 729         }
 730
 731         if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
 732                 /* 1. power capabilities */
 733                 pos = skb_put(skb, 4);
 734                 *pos++ = WLAN_EID_PWR_CAPABILITY;
 735                 *pos++ = 2;
 736                 *pos++ = 0; /* min tx power */
 737                  /* max tx power */
 738                 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
 739
 740                 /* 2. supported channels */
 741                 /* TODO: get this in reg domain format */
 742                 pos = skb_put(skb, 2 * sband->n_channels + 2);
 743                 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 744                 *pos++ = 2 * sband->n_channels;
 745                 for (i = 0; i < sband->n_channels; i++) {
 746                         *pos++ = ieee80211_frequency_to_channel(
 747                                         sband->channels[i].center_freq);
 748                         *pos++ = 1; /* one channel in the subband*/
 749                 }
 750         }
 751
 752         /* if present, add any custom IEs that go before HT */
 753         if (assoc_data->ie_len) {
 754                 static const u8 before_ht[] = {
 755                         WLAN_EID_SSID,
 756                         WLAN_EID_SUPP_RATES,
 757                         WLAN_EID_EXT_SUPP_RATES,
 758                         WLAN_EID_PWR_CAPABILITY,
 759                         WLAN_EID_SUPPORTED_CHANNELS,
 760                         WLAN_EID_RSN,
 761                         WLAN_EID_QOS_CAPA,
 762                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 763                         WLAN_EID_MOBILITY_DOMAIN,
 764                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 765                 };
 766                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 767                                              before_ht, ARRAY_SIZE(before_ht),
 768                                              offset);
 769                 pos = skb_put(skb, noffset - offset);
 770                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 771                 offset = noffset;
 772         }
 773
 774         if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
 775                          !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
 776                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 777
 778         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
 779                 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
 780                                     sband, chan, sdata->smps_mode);
 781
 782         /* if present, add any custom IEs that go before VHT */
 783         if (assoc_data->ie_len) {
 784                 static const u8 before_vht[] = {
 785                         WLAN_EID_SSID,
 786                         WLAN_EID_SUPP_RATES,
 787                         WLAN_EID_EXT_SUPP_RATES,
 788                         WLAN_EID_PWR_CAPABILITY,
 789                         WLAN_EID_SUPPORTED_CHANNELS,
 790                         WLAN_EID_RSN,
 791                         WLAN_EID_QOS_CAPA,
 792                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 793                         WLAN_EID_MOBILITY_DOMAIN,
 794                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 795                         WLAN_EID_HT_CAPABILITY,
 796                         WLAN_EID_BSS_COEX_2040,
 797                         WLAN_EID_EXT_CAPABILITY,
 798                         WLAN_EID_QOS_TRAFFIC_CAPA,
 799                         WLAN_EID_TIM_BCAST_REQ,
 800                         WLAN_EID_INTERWORKING,
 801                 };
 802                 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
 803                                              before_vht, ARRAY_SIZE(before_vht),
 804                                              offset);
 805                 pos = skb_put(skb, noffset - offset);
 806                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 807                 offset = noffset;
 808         }
 809
 810         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
 811                 ieee80211_add_vht_ie(sdata, skb, sband,
 812                                      &assoc_data->ap_vht_cap);
 813
 814         /* if present, add any custom non-vendor IEs that go after HT */
 815         if (assoc_data->ie_len) {
 816                 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
 817                                                     assoc_data->ie_len,
 818                                                     offset);
 819                 pos = skb_put(skb, noffset - offset);
 820                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 821                 offset = noffset;
 822         }
 823
 824         if (assoc_data->wmm) {
 825                 if (assoc_data->uapsd) {
 826                         qos_info = ifmgd->uapsd_queues;
 827                         qos_info |= (ifmgd->uapsd_max_sp_len <<
 828                                      IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
 829                 } else {
 830                         qos_info = 0;
 831                 }
 832
 833                 pos = skb_put(skb, 9);
 834                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 835                 *pos++ = 7; /* len */
 836                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 837                 *pos++ = 0x50;
 838                 *pos++ = 0xf2;
 839                 *pos++ = 2; /* WME */
 840                 *pos++ = 0; /* WME info */
 841                 *pos++ = 1; /* WME ver */
 842                 *pos++ = qos_info;
 843         }
 844
 845         /* add any remaining custom (i.e. vendor specific here) IEs */
 846         if (assoc_data->ie_len) {
 847                 noffset = assoc_data->ie_len;
 848                 pos = skb_put(skb, noffset - offset);
 849                 memcpy(pos, assoc_data->ie + offset, noffset - offset);
 850         }
 851
 852         drv_mgd_prepare_tx(local, sdata);
 853
 854         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 855         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 856                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
 857                                                 IEEE80211_TX_INTFL_MLME_CONN_TX;
 858         ieee80211_tx_skb(sdata, skb);
 859 }
 860
 861 void ieee80211_send_pspoll(struct ieee80211_local *local,
 862                            struct ieee80211_sub_if_data *sdata)
 863 {
 864         struct ieee80211_pspoll *pspoll;
 865         struct sk_buff *skb;
 866
 867         skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
 868         if (!skb)
 869                 return;
 870
 871         pspoll = (struct ieee80211_pspoll *) skb->data;
 872         pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 873
 874         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 875         ieee80211_tx_skb(sdata, skb);
 876 }
 877
 878 void ieee80211_send_nullfunc(struct ieee80211_local *local,
 879                              struct ieee80211_sub_if_data *sdata,
 880                              int powersave)
 881 {
 882         struct sk_buff *skb;
 883         struct ieee80211_hdr_3addr *nullfunc;
 884         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 885
 886         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
 887         if (!skb)
 888                 return;
 889
 890         nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
 891         if (powersave)
 892                 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 893
 894         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
 895                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
 896
 897         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 898                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 899
 900         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
 901                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 902
 903         ieee80211_tx_skb(sdata, skb);
 904 }
 905
 906 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 907                                           struct ieee80211_sub_if_data *sdata)
 908 {
 909         struct sk_buff *skb;
 910         struct ieee80211_hdr *nullfunc;
 911         __le16 fc;
 912
 913         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
 914                 return;
 915
 916         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
 917         if (!skb)
 918                 return;
 919
 920         skb_reserve(skb, local->hw.extra_tx_headroom);
 921
 922         nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
 923         memset(nullfunc, 0, 30);
 924         fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
 925                          IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
 926         nullfunc->frame_control = fc;
 927         memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
 928         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
 929         memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
 930         memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
 931
 932         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 933         ieee80211_tx_skb(sdata, skb);
 934 }
 935
 936 /* spectrum management related things */
 937 static void ieee80211_chswitch_work(struct work_struct *work)
 938 {
 939         struct ieee80211_sub_if_data *sdata =
 940                 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
 941         struct ieee80211_local *local = sdata->local;
 942         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 943         u32 changed = 0;
 944         int ret;
 945
 946         if (!ieee80211_sdata_running(sdata))
 947                 return;
 948
 949         sdata_lock(sdata);
 950         if (!ifmgd->associated)
 951                 goto out;
 952
 953         mutex_lock(&local->mtx);
 954         ret = ieee80211_vif_change_channel(sdata, &changed);
 955         mutex_unlock(&local->mtx);
 956         if (ret) {
 957                 sdata_info(sdata,
 958                            "vif channel switch failed, disconnecting\n");
 959                 ieee80211_queue_work(&sdata->local->hw,
 960                                      &ifmgd->csa_connection_drop_work);
 961                 goto out;
 962         }
 963
 964         if (!local->use_chanctx) {
 965                 local->_oper_chandef = sdata->csa_chandef;
 966                 /* Call "hw_config" only if doing sw channel switch.
 967                  * Otherwise update the channel directly
 968                  */
 969                 if (!local->ops->channel_switch)
 970                         ieee80211_hw_config(local, 0);
 971                 else
 972                         local->hw.conf.chandef = local->_oper_chandef;
 973         }
 974
 975         /* XXX: shouldn't really modify cfg80211-owned data! */
 976         ifmgd->associated->channel = sdata->csa_chandef.chan;
 977
 978         ieee80211_bss_info_change_notify(sdata, changed);
 979
 980         mutex_lock(&local->mtx);
 981         sdata->vif.csa_active = false;
 982         /* XXX: wait for a beacon first? */
 983         if (!ieee80211_csa_needs_block_tx(local))
 984                 ieee80211_wake_queues_by_reason(&local->hw,
 985                                         IEEE80211_MAX_QUEUE_MAP,
 986                                         IEEE80211_QUEUE_STOP_REASON_CSA);
 987         mutex_unlock(&local->mtx);
 988
 989         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
 990
 991         ieee80211_sta_reset_beacon_monitor(sdata);
 992         ieee80211_sta_reset_conn_monitor(sdata);
 993
 994 out:
 995         sdata_unlock(sdata);
 996 }
 997
 998 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
 999 {
1000         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1001         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1002
1003         trace_api_chswitch_done(sdata, success);
1004         if (!success) {
1005                 sdata_info(sdata,
1006                            "driver channel switch failed, disconnecting\n");
1007                 ieee80211_queue_work(&sdata->local->hw,
1008                                      &ifmgd->csa_connection_drop_work);
1009         } else {
1010                 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1011         }
1012 }
1013 EXPORT_SYMBOL(ieee80211_chswitch_done);
1014
1015 static void ieee80211_chswitch_timer(unsigned long data)
1016 {
1017         struct ieee80211_sub_if_data *sdata =
1018                 (struct ieee80211_sub_if_data *) data;
1019
1020         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1021 }
1022
1023 static void
1024 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1025                                  u64 timestamp, struct ieee802_11_elems *elems,
1026                                  bool beacon)
1027 {
1028         struct ieee80211_local *local = sdata->local;
1029         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1030         struct cfg80211_bss *cbss = ifmgd->associated;
1031         struct ieee80211_chanctx *chanctx;
1032         enum ieee80211_band current_band;
1033         struct ieee80211_csa_ie csa_ie;
1034         int res;
1035
1036         sdata_assert_lock(sdata);
1037
1038         if (!cbss)
1039                 return;
1040
1041         if (local->scanning)
1042                 return;
1043
1044         /* disregard subsequent announcements if we are already processing */
1045         if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1046                 return;
1047
1048         current_band = cbss->channel->band;
1049         memset(&csa_ie, 0, sizeof(csa_ie));
1050         res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
1051                                            ifmgd->flags,
1052                                            ifmgd->associated->bssid, &csa_ie);
1053         if (res < 0)
1054                 ieee80211_queue_work(&local->hw,
1055                                      &ifmgd->csa_connection_drop_work);
1056         if (res)
1057                 return;
1058
1059         if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1060                                      IEEE80211_CHAN_DISABLED)) {
1061                 sdata_info(sdata,
1062                            "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1063                            ifmgd->associated->bssid,
1064                            csa_ie.chandef.chan->center_freq,
1065                            csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1066                            csa_ie.chandef.center_freq2);
1067                 ieee80211_queue_work(&local->hw,
1068                                      &ifmgd->csa_connection_drop_work);
1069                 return;
1070         }
1071
1072         ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1073
1074         mutex_lock(&local->chanctx_mtx);
1075         if (local->use_chanctx) {
1076                 u32 num_chanctx = 0;
1077                 list_for_each_entry(chanctx, &local->chanctx_list, list)
1078                        num_chanctx++;
1079
1080                 if (num_chanctx > 1 ||
1081                     !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1082                         sdata_info(sdata,
1083                                    "not handling chan-switch with channel contexts\n");
1084                         ieee80211_queue_work(&local->hw,
1085                                              &ifmgd->csa_connection_drop_work);
1086                         mutex_unlock(&local->chanctx_mtx);
1087                         return;
1088                 }
1089         }
1090
1091         if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1092                 ieee80211_queue_work(&local->hw,
1093                                      &ifmgd->csa_connection_drop_work);
1094                 mutex_unlock(&local->chanctx_mtx);
1095                 return;
1096         }
1097         chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1098                                struct ieee80211_chanctx, conf);
1099         if (ieee80211_chanctx_refcount(local, chanctx) > 1) {
1100                 sdata_info(sdata,
1101                            "channel switch with multiple interfaces on the same channel, disconnecting\n");
1102                 ieee80211_queue_work(&local->hw,
1103                                      &ifmgd->csa_connection_drop_work);
1104                 mutex_unlock(&local->chanctx_mtx);
1105                 return;
1106         }
1107         mutex_unlock(&local->chanctx_mtx);
1108
1109         sdata->csa_chandef = csa_ie.chandef;
1110
1111         mutex_lock(&local->mtx);
1112         sdata->vif.csa_active = true;
1113         sdata->csa_block_tx = csa_ie.mode;
1114
1115         if (sdata->csa_block_tx)
1116                 ieee80211_stop_queues_by_reason(&local->hw,
1117                                         IEEE80211_MAX_QUEUE_MAP,
1118                                         IEEE80211_QUEUE_STOP_REASON_CSA);
1119         mutex_unlock(&local->mtx);
1120
1121         if (local->ops->channel_switch) {
1122                 /* use driver's channel switch callback */
1123                 struct ieee80211_channel_switch ch_switch = {
1124                         .timestamp = timestamp,
1125                         .block_tx = csa_ie.mode,
1126                         .chandef = csa_ie.chandef,
1127                         .count = csa_ie.count,
1128                 };
1129
1130                 drv_channel_switch(local, &ch_switch);
1131                 return;
1132         }
1133
1134         /* channel switch handled in software */
1135         if (csa_ie.count <= 1)
1136                 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1137         else
1138                 mod_timer(&ifmgd->chswitch_timer,
1139                           TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
1140 }
1141
1142 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1143                                        struct ieee80211_channel *channel,
1144                                        const u8 *country_ie, u8 country_ie_len,
1145                                        const u8 *pwr_constr_elem)
1146 {
1147         struct ieee80211_country_ie_triplet *triplet;
1148         int chan = ieee80211_frequency_to_channel(channel->center_freq);
1149         int i, chan_pwr, chan_increment, new_ap_level;
1150         bool have_chan_pwr = false;
1151
1152         /* Invalid IE */
1153         if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1154                 return 0;
1155
1156         triplet = (void *)(country_ie + 3);
1157         country_ie_len -= 3;
1158
1159         switch (channel->band) {
1160         default:
1161                 WARN_ON_ONCE(1);
1162                 /* fall through */
1163         case IEEE80211_BAND_2GHZ:
1164         case IEEE80211_BAND_60GHZ:
1165                 chan_increment = 1;
1166                 break;
1167         case IEEE80211_BAND_5GHZ:
1168                 chan_increment = 4;
1169                 break;
1170         }
1171
1172         /* find channel */
1173         while (country_ie_len >= 3) {
1174                 u8 first_channel = triplet->chans.first_channel;
1175
1176                 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1177                         goto next;
1178
1179                 for (i = 0; i < triplet->chans.num_channels; i++) {
1180                         if (first_channel + i * chan_increment == chan) {
1181                                 have_chan_pwr = true;
1182                                 chan_pwr = triplet->chans.max_power;
1183                                 break;
1184                         }
1185                 }
1186                 if (have_chan_pwr)
1187                         break;
1188
1189  next:
1190                 triplet++;
1191                 country_ie_len -= 3;
1192         }
1193
1194         if (!have_chan_pwr)
1195                 return 0;
1196
1197         new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1198
1199         if (sdata->ap_power_level == new_ap_level)
1200                 return 0;
1201
1202         sdata_info(sdata,
1203                    "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1204                    new_ap_level, chan_pwr, *pwr_constr_elem,
1205                    sdata->u.mgd.bssid);
1206         sdata->ap_power_level = new_ap_level;
1207         if (__ieee80211_recalc_txpower(sdata))
1208                 return BSS_CHANGED_TXPOWER;
1209         return 0;
1210 }
1211
1212 /* powersave */
1213 static void ieee80211_enable_ps(struct ieee80211_local *local,
1214                                 struct ieee80211_sub_if_data *sdata)
1215 {
1216         struct ieee80211_conf *conf = &local->hw.conf;
1217
1218         /*
1219          * If we are scanning right now then the parameters will
1220          * take effect when scan finishes.
1221          */
1222         if (local->scanning)
1223                 return;
1224
1225         if (conf->dynamic_ps_timeout > 0 &&
1226             !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1227                 mod_timer(&local->dynamic_ps_timer, jiffies +
1228                           msecs_to_jiffies(conf->dynamic_ps_timeout));
1229         } else {
1230                 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1231                         ieee80211_send_nullfunc(local, sdata, 1);
1232
1233                 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1234                     (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1235                         return;
1236
1237                 conf->flags |= IEEE80211_CONF_PS;
1238                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1239         }
1240 }
1241
1242 static void ieee80211_change_ps(struct ieee80211_local *local)
1243 {
1244         struct ieee80211_conf *conf = &local->hw.conf;
1245
1246         if (local->ps_sdata) {
1247                 ieee80211_enable_ps(local, local->ps_sdata);
1248         } else if (conf->flags & IEEE80211_CONF_PS) {
1249                 conf->flags &= ~IEEE80211_CONF_PS;
1250                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1251                 del_timer_sync(&local->dynamic_ps_timer);
1252                 cancel_work_sync(&local->dynamic_ps_enable_work);
1253         }
1254 }
1255
1256 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1257 {
1258         struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1259         struct sta_info *sta = NULL;
1260         bool authorized = false;
1261
1262         if (!mgd->powersave)
1263                 return false;
1264
1265         if (mgd->broken_ap)
1266                 return false;
1267
1268         if (!mgd->associated)
1269                 return false;
1270
1271         if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1272                 return false;
1273
1274         if (!mgd->have_beacon)
1275                 return false;
1276
1277         rcu_read_lock();
1278         sta = sta_info_get(sdata, mgd->bssid);
1279         if (sta)
1280                 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1281         rcu_read_unlock();
1282
1283         return authorized;
1284 }
1285
1286 /* need to hold RTNL or interface lock */
1287 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1288 {
1289         struct ieee80211_sub_if_data *sdata, *found = NULL;
1290         int count = 0;
1291         int timeout;
1292
1293         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1294                 local->ps_sdata = NULL;
1295                 return;
1296         }
1297
1298         list_for_each_entry(sdata, &local->interfaces, list) {
1299                 if (!ieee80211_sdata_running(sdata))
1300                         continue;
1301                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1302                         /* If an AP vif is found, then disable PS
1303                          * by setting the count to zero thereby setting
1304                          * ps_sdata to NULL.
1305                          */
1306                         count = 0;
1307                         break;
1308                 }
1309                 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1310                         continue;
1311                 found = sdata;
1312                 count++;
1313         }
1314
1315         if (count == 1 && ieee80211_powersave_allowed(found)) {
1316                 s32 beaconint_us;
1317
1318                 if (latency < 0)
1319                         latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1320
1321                 beaconint_us = ieee80211_tu_to_usec(
1322                                         found->vif.bss_conf.beacon_int);
1323
1324                 timeout = local->dynamic_ps_forced_timeout;
1325                 if (timeout < 0) {
1326                         /*
1327                          * Go to full PSM if the user configures a very low
1328                          * latency requirement.
1329                          * The 2000 second value is there for compatibility
1330                          * until the PM_QOS_NETWORK_LATENCY is configured
1331                          * with real values.
1332                          */
1333                         if (latency > (1900 * USEC_PER_MSEC) &&
1334                             latency != (2000 * USEC_PER_SEC))
1335                                 timeout = 0;
1336                         else
1337                                 timeout = 100;
1338                 }
1339                 local->hw.conf.dynamic_ps_timeout = timeout;
1340
1341                 if (beaconint_us > latency) {
1342                         local->ps_sdata = NULL;
1343                 } else {
1344                         int maxslp = 1;
1345                         u8 dtimper = found->u.mgd.dtim_period;
1346
1347                         /* If the TIM IE is invalid, pretend the value is 1 */
1348                         if (!dtimper)
1349                                 dtimper = 1;
1350                         else if (dtimper > 1)
1351                                 maxslp = min_t(int, dtimper,
1352                                                     latency / beaconint_us);
1353
1354                         local->hw.conf.max_sleep_period = maxslp;
1355                         local->hw.conf.ps_dtim_period = dtimper;
1356                         local->ps_sdata = found;
1357                 }
1358         } else {
1359                 local->ps_sdata = NULL;
1360         }
1361
1362         ieee80211_change_ps(local);
1363 }
1364
1365 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1366 {
1367         bool ps_allowed = ieee80211_powersave_allowed(sdata);
1368
1369         if (sdata->vif.bss_conf.ps != ps_allowed) {
1370                 sdata->vif.bss_conf.ps = ps_allowed;
1371                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1372         }
1373 }
1374
1375 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1376 {
1377         struct ieee80211_local *local =
1378                 container_of(work, struct ieee80211_local,
1379                              dynamic_ps_disable_work);
1380
1381         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1382                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1383                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1384         }
1385
1386         ieee80211_wake_queues_by_reason(&local->hw,
1387                                         IEEE80211_MAX_QUEUE_MAP,
1388                                         IEEE80211_QUEUE_STOP_REASON_PS);
1389 }
1390
1391 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1392 {
1393         struct ieee80211_local *local =
1394                 container_of(work, struct ieee80211_local,
1395                              dynamic_ps_enable_work);
1396         struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1397         struct ieee80211_if_managed *ifmgd;
1398         unsigned long flags;
1399         int q;
1400
1401         /* can only happen when PS was just disabled anyway */
1402         if (!sdata)
1403                 return;
1404
1405         ifmgd = &sdata->u.mgd;
1406
1407         if (local->hw.conf.flags & IEEE80211_CONF_PS)
1408                 return;
1409
1410         if (local->hw.conf.dynamic_ps_timeout > 0) {
1411                 /* don't enter PS if TX frames are pending */
1412                 if (drv_tx_frames_pending(local)) {
1413                         mod_timer(&local->dynamic_ps_timer, jiffies +
1414                                   msecs_to_jiffies(
1415                                   local->hw.conf.dynamic_ps_timeout));
1416                         return;
1417                 }
1418
1419                 /*
1420                  * transmission can be stopped by others which leads to
1421                  * dynamic_ps_timer expiry. Postpone the ps timer if it
1422                  * is not the actual idle state.
1423                  */
1424                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1425                 for (q = 0; q < local->hw.queues; q++) {
1426                         if (local->queue_stop_reasons[q]) {
1427                                 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1428                                                        flags);
1429                                 mod_timer(&local->dynamic_ps_timer, jiffies +
1430                                           msecs_to_jiffies(
1431                                           local->hw.conf.dynamic_ps_timeout));
1432                                 return;
1433                         }
1434                 }
1435                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1436         }
1437
1438         if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1439             !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1440                 if (drv_tx_frames_pending(local)) {
1441                         mod_timer(&local->dynamic_ps_timer, jiffies +
1442                                   msecs_to_jiffies(
1443                                   local->hw.conf.dynamic_ps_timeout));
1444                 } else {
1445                         ieee80211_send_nullfunc(local, sdata, 1);
1446                         /* Flush to get the tx status of nullfunc frame */
1447                         ieee80211_flush_queues(local, sdata);
1448                 }
1449         }
1450
1451         if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1452               (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1453             (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1454                 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1455                 local->hw.conf.flags |= IEEE80211_CONF_PS;
1456                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1457         }
1458 }
1459
1460 void ieee80211_dynamic_ps_timer(unsigned long data)
1461 {
1462         struct ieee80211_local *local = (void *) data;
1463
1464         if (local->quiescing || local->suspended)
1465                 return;
1466
1467         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1468 }
1469
1470 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1471 {
1472         struct delayed_work *delayed_work =
1473                 container_of(work, struct delayed_work, work);
1474         struct ieee80211_sub_if_data *sdata =
1475                 container_of(delayed_work, struct ieee80211_sub_if_data,
1476                              dfs_cac_timer_work);
1477         struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1478
1479         mutex_lock(&sdata->local->mtx);
1480         if (sdata->wdev.cac_started) {
1481                 ieee80211_vif_release_channel(sdata);
1482                 cfg80211_cac_event(sdata->dev, &chandef,
1483                                    NL80211_RADAR_CAC_FINISHED,
1484                                    GFP_KERNEL);
1485         }
1486         mutex_unlock(&sdata->local->mtx);
1487 }
1488
1489 /* MLME */
1490 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1491                                      struct ieee80211_sub_if_data *sdata,
1492                                      const u8 *wmm_param, size_t wmm_param_len)
1493 {
1494         struct ieee80211_tx_queue_params params;
1495         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1496         size_t left;
1497         int count;
1498         const u8 *pos;
1499         u8 uapsd_queues = 0;
1500
1501         if (!local->ops->conf_tx)
1502                 return false;
1503
1504         if (local->hw.queues < IEEE80211_NUM_ACS)
1505                 return false;
1506
1507         if (!wmm_param)
1508                 return false;
1509
1510         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1511                 return false;
1512
1513         if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1514                 uapsd_queues = ifmgd->uapsd_queues;
1515
1516         count = wmm_param[6] & 0x0f;
1517         if (count == ifmgd->wmm_last_param_set)
1518                 return false;
1519         ifmgd->wmm_last_param_set = count;
1520
1521         pos = wmm_param + 8;
1522         left = wmm_param_len - 8;
1523
1524         memset(&params, 0, sizeof(params));
1525
1526         sdata->wmm_acm = 0;
1527         for (; left >= 4; left -= 4, pos += 4) {
1528                 int aci = (pos[0] >> 5) & 0x03;
1529                 int acm = (pos[0] >> 4) & 0x01;
1530                 bool uapsd = false;
1531                 int queue;
1532
1533                 switch (aci) {
1534                 case 1: /* AC_BK */
1535                         queue = 3;
1536                         if (acm)
1537                                 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1538                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1539                                 uapsd = true;
1540                         break;
1541                 case 2: /* AC_VI */
1542                         queue = 1;
1543                         if (acm)
1544                                 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1545                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1546                                 uapsd = true;
1547                         break;
1548                 case 3: /* AC_VO */
1549                         queue = 0;
1550                         if (acm)
1551                                 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1552                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1553                                 uapsd = true;
1554                         break;
1555                 case 0: /* AC_BE */
1556                 default:
1557                         queue = 2;
1558                         if (acm)
1559                                 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1560                         if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1561                                 uapsd = true;
1562                         break;
1563                 }
1564
1565                 params.aifs = pos[0] & 0x0f;
1566                 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1567                 params.cw_min = ecw2cw(pos[1] & 0x0f);
1568                 params.txop = get_unaligned_le16(pos + 2);
1569                 params.acm = acm;
1570                 params.uapsd = uapsd;
1571
1572                 mlme_dbg(sdata,
1573                          "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1574                          queue, aci, acm,
1575                          params.aifs, params.cw_min, params.cw_max,
1576                          params.txop, params.uapsd);
1577                 sdata->tx_conf[queue] = params;
1578                 if (drv_conf_tx(local, sdata, queue, &params))
1579                         sdata_err(sdata,
1580                                   "failed to set TX queue parameters for queue %d\n",
1581                                   queue);
1582         }
1583
1584         /* enable WMM or activate new settings */
1585         sdata->vif.bss_conf.qos = true;
1586         return true;
1587 }
1588
1589 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1590 {
1591         lockdep_assert_held(&sdata->local->mtx);
1592
1593         sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1594         ieee80211_run_deferred_scan(sdata->local);
1595 }
1596
1597 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1598 {
1599         mutex_lock(&sdata->local->mtx);
1600         __ieee80211_stop_poll(sdata);
1601         mutex_unlock(&sdata->local->mtx);
1602 }
1603
1604 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1605                                            u16 capab, bool erp_valid, u8 erp)
1606 {
1607         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1608         u32 changed = 0;
1609         bool use_protection;
1610         bool use_short_preamble;
1611         bool use_short_slot;
1612
1613         if (erp_valid) {
1614                 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1615                 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1616         } else {
1617                 use_protection = false;
1618                 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1619         }
1620
1621         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1622         if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1623                 use_short_slot = true;
1624
1625         if (use_protection != bss_conf->use_cts_prot) {
1626                 bss_conf->use_cts_prot = use_protection;
1627                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1628         }
1629
1630         if (use_short_preamble != bss_conf->use_short_preamble) {
1631                 bss_conf->use_short_preamble = use_short_preamble;
1632                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1633         }
1634
1635         if (use_short_slot != bss_conf->use_short_slot) {
1636                 bss_conf->use_short_slot = use_short_slot;
1637                 changed |= BSS_CHANGED_ERP_SLOT;
1638         }
1639
1640         return changed;
1641 }
1642
1643 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1644                                      struct cfg80211_bss *cbss,
1645                                      u32 bss_info_changed)
1646 {
1647         struct ieee80211_bss *bss = (void *)cbss->priv;
1648         struct ieee80211_local *local = sdata->local;
1649         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1650
1651         bss_info_changed |= BSS_CHANGED_ASSOC;
1652         bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1653                 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1654
1655         sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1656                 beacon_loss_count * bss_conf->beacon_int));
1657
1658         sdata->u.mgd.associated = cbss;
1659         memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1660
1661         sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1662
1663         if (sdata->vif.p2p) {
1664                 const struct cfg80211_bss_ies *ies;
1665
1666                 rcu_read_lock();
1667                 ies = rcu_dereference(cbss->ies);
1668                 if (ies) {
1669                         int ret;
1670
1671                         ret = cfg80211_get_p2p_attr(
1672                                         ies->data, ies->len,
1673                                         IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1674                                         (u8 *) &bss_conf->p2p_noa_attr,
1675                                         sizeof(bss_conf->p2p_noa_attr));
1676                         if (ret >= 2) {
1677                                 sdata->u.mgd.p2p_noa_index =
1678                                         bss_conf->p2p_noa_attr.index;
1679                                 bss_info_changed |= BSS_CHANGED_P2P_PS;
1680                         }
1681                 }
1682                 rcu_read_unlock();
1683         }
1684
1685         /* just to be sure */
1686         ieee80211_stop_poll(sdata);
1687
1688         ieee80211_led_assoc(local, 1);
1689
1690         if (sdata->u.mgd.have_beacon) {
1691                 /*
1692                  * If the AP is buggy we may get here with no DTIM period
1693                  * known, so assume it's 1 which is the only safe assumption
1694                  * in that case, although if the TIM IE is broken powersave
1695                  * probably just won't work at all.
1696                  */
1697                 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1698                 bss_conf->beacon_rate = bss->beacon_rate;
1699                 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1700         } else {
1701                 bss_conf->beacon_rate = NULL;
1702                 bss_conf->dtim_period = 0;
1703         }
1704
1705         bss_conf->assoc = 1;
1706
1707         /* Tell the driver to monitor connection quality (if supported) */
1708         if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1709             bss_conf->cqm_rssi_thold)
1710                 bss_info_changed |= BSS_CHANGED_CQM;
1711
1712         /* Enable ARP filtering */
1713         if (bss_conf->arp_addr_cnt)
1714                 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1715
1716         ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1717
1718         mutex_lock(&local->iflist_mtx);
1719         ieee80211_recalc_ps(local, -1);
1720         mutex_unlock(&local->iflist_mtx);
1721
1722         ieee80211_recalc_smps(sdata);
1723         ieee80211_recalc_ps_vif(sdata);
1724
1725         netif_carrier_on(sdata->dev);
1726 }
1727
1728 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1729                                    u16 stype, u16 reason, bool tx,
1730                                    u8 *frame_buf)
1731 {
1732         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1733         struct ieee80211_local *local = sdata->local;
1734         u32 changed = 0;
1735
1736         sdata_assert_lock(sdata);
1737
1738         if (WARN_ON_ONCE(tx && !frame_buf))
1739                 return;
1740
1741         if (WARN_ON(!ifmgd->associated))
1742                 return;
1743
1744         ieee80211_stop_poll(sdata);
1745
1746         ifmgd->associated = NULL;
1747         netif_carrier_off(sdata->dev);
1748
1749         /*
1750          * if we want to get out of ps before disassoc (why?) we have
1751          * to do it before sending disassoc, as otherwise the null-packet
1752          * won't be valid.
1753          */
1754         if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1755                 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1756                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1757         }
1758         local->ps_sdata = NULL;
1759
1760         /* disable per-vif ps */
1761         ieee80211_recalc_ps_vif(sdata);
1762
1763         /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1764         if (tx)
1765                 ieee80211_flush_queues(local, sdata);
1766
1767         /* deauthenticate/disassociate now */
1768         if (tx || frame_buf)
1769                 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1770                                                reason, tx, frame_buf);
1771
1772         /* flush out frame */
1773         if (tx)
1774                 ieee80211_flush_queues(local, sdata);
1775
1776         /* clear bssid only after building the needed mgmt frames */
1777         memset(ifmgd->bssid, 0, ETH_ALEN);
1778
1779         /* remove AP and TDLS peers */
1780         sta_info_flush(sdata);
1781
1782         /* finally reset all BSS / config parameters */
1783         changed |= ieee80211_reset_erp_info(sdata);
1784
1785         ieee80211_led_assoc(local, 0);
1786         changed |= BSS_CHANGED_ASSOC;
1787         sdata->vif.bss_conf.assoc = false;
1788
1789         ifmgd->p2p_noa_index = -1;
1790         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1791                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1792
1793         /* on the next assoc, re-program HT/VHT parameters */
1794         memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1795         memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1796         memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1797         memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1798
1799         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1800
1801         del_timer_sync(&local->dynamic_ps_timer);
1802         cancel_work_sync(&local->dynamic_ps_enable_work);
1803
1804         /* Disable ARP filtering */
1805         if (sdata->vif.bss_conf.arp_addr_cnt)
1806                 changed |= BSS_CHANGED_ARP_FILTER;
1807
1808         sdata->vif.bss_conf.qos = false;
1809         changed |= BSS_CHANGED_QOS;
1810
1811         /* The BSSID (not really interesting) and HT changed */
1812         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1813         ieee80211_bss_info_change_notify(sdata, changed);
1814
1815         /* disassociated - set to defaults now */
1816         ieee80211_set_wmm_default(sdata, false);
1817
1818         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1819         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1820         del_timer_sync(&sdata->u.mgd.timer);
1821         del_timer_sync(&sdata->u.mgd.chswitch_timer);
1822
1823         sdata->vif.bss_conf.dtim_period = 0;
1824         sdata->vif.bss_conf.beacon_rate = NULL;
1825
1826         ifmgd->have_beacon = false;
1827
1828         ifmgd->flags = 0;
1829         mutex_lock(&local->mtx);
1830         ieee80211_vif_release_channel(sdata);
1831
1832         sdata->vif.csa_active = false;
1833         if (!ieee80211_csa_needs_block_tx(local))
1834                 ieee80211_wake_queues_by_reason(&local->hw,
1835                                         IEEE80211_MAX_QUEUE_MAP,
1836                                         IEEE80211_QUEUE_STOP_REASON_CSA);
1837         mutex_unlock(&local->mtx);
1838
1839         sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1840 }
1841
1842 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1843                              struct ieee80211_hdr *hdr)
1844 {
1845         /*
1846          * We can postpone the mgd.timer whenever receiving unicast frames
1847          * from AP because we know that the connection is working both ways
1848          * at that time. But multicast frames (and hence also beacons) must
1849          * be ignored here, because we need to trigger the timer during
1850          * data idle periods for sending the periodic probe request to the
1851          * AP we're connected to.
1852          */
1853         if (is_multicast_ether_addr(hdr->addr1))
1854                 return;
1855
1856         ieee80211_sta_reset_conn_monitor(sdata);
1857 }
1858
1859 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1860 {
1861         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1862         struct ieee80211_local *local = sdata->local;
1863
1864         mutex_lock(&local->mtx);
1865         if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1866                 goto out;
1867
1868         __ieee80211_stop_poll(sdata);
1869
1870         mutex_lock(&local->iflist_mtx);
1871         ieee80211_recalc_ps(local, -1);
1872         mutex_unlock(&local->iflist_mtx);
1873
1874         if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1875                 goto out;
1876
1877         /*
1878          * We've received a probe response, but are not sure whether
1879          * we have or will be receiving any beacons or data, so let's
1880          * schedule the timers again, just in case.
1881          */
1882         ieee80211_sta_reset_beacon_monitor(sdata);
1883
1884         mod_timer(&ifmgd->conn_mon_timer,
1885                   round_jiffies_up(jiffies +
1886                                    IEEE80211_CONNECTION_IDLE_TIME));
1887 out:
1888         mutex_unlock(&local->mtx);
1889 }
1890
1891 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1892                              struct ieee80211_hdr *hdr, bool ack)
1893 {
1894         if (!ieee80211_is_data(hdr->frame_control))
1895             return;
1896
1897         if (ieee80211_is_nullfunc(hdr->frame_control) &&
1898             sdata->u.mgd.probe_send_count > 0) {
1899                 if (ack)
1900                         ieee80211_sta_reset_conn_monitor(sdata);
1901                 else
1902                         sdata->u.mgd.nullfunc_failed = true;
1903                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1904                 return;
1905         }
1906
1907         if (ack)
1908                 ieee80211_sta_reset_conn_monitor(sdata);
1909 }
1910
1911 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1912 {
1913         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1914         const u8 *ssid;
1915         u8 *dst = ifmgd->associated->bssid;
1916         u8 unicast_limit = max(1, max_probe_tries - 3);
1917
1918         /*
1919          * Try sending broadcast probe requests for the last three
1920          * probe requests after the first ones failed since some
1921          * buggy APs only support broadcast probe requests.
1922          */
1923         if (ifmgd->probe_send_count >= unicast_limit)
1924                 dst = NULL;
1925
1926         /*
1927          * When the hardware reports an accurate Tx ACK status, it's
1928          * better to send a nullfunc frame instead of a probe request,
1929          * as it will kick us off the AP quickly if we aren't associated
1930          * anymore. The timeout will be reset if the frame is ACKed by
1931          * the AP.
1932          */
1933         ifmgd->probe_send_count++;
1934
1935         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1936                 ifmgd->nullfunc_failed = false;
1937                 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1938         } else {
1939                 int ssid_len;
1940
1941                 rcu_read_lock();
1942                 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1943                 if (WARN_ON_ONCE(ssid == NULL))
1944                         ssid_len = 0;
1945                 else
1946                         ssid_len = ssid[1];
1947
1948                 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1949                                          0, (u32) -1, true, 0,
1950                                          ifmgd->associated->channel, false);
1951                 rcu_read_unlock();
1952         }
1953
1954         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1955         run_again(sdata, ifmgd->probe_timeout);
1956         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1957                 ieee80211_flush_queues(sdata->local, sdata);
1958 }
1959
1960 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1961                                    bool beacon)
1962 {
1963         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1964         bool already = false;
1965
1966         if (!ieee80211_sdata_running(sdata))
1967                 return;
1968
1969         sdata_lock(sdata);
1970
1971         if (!ifmgd->associated)
1972                 goto out;
1973
1974         mutex_lock(&sdata->local->mtx);
1975
1976         if (sdata->local->tmp_channel || sdata->local->scanning) {
1977                 mutex_unlock(&sdata->local->mtx);
1978                 goto out;
1979         }
1980
1981         if (beacon) {
1982                 mlme_dbg_ratelimited(sdata,
1983                                      "detected beacon loss from AP (missed %d beacons) - probing\n",
1984                                      beacon_loss_count);
1985
1986                 ieee80211_cqm_rssi_notify(&sdata->vif,
1987                                           NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
1988                                           GFP_KERNEL);
1989         }
1990
1991         /*
1992          * The driver/our work has already reported this event or the
1993          * connection monitoring has kicked in and we have already sent
1994          * a probe request. Or maybe the AP died and the driver keeps
1995          * reporting until we disassociate...
1996          *
1997          * In either case we have to ignore the current call to this
1998          * function (except for setting the correct probe reason bit)
1999          * because otherwise we would reset the timer every time and
2000          * never check whether we received a probe response!
2001          */
2002         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2003                 already = true;
2004
2005         ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2006
2007         mutex_unlock(&sdata->local->mtx);
2008
2009         if (already)
2010                 goto out;
2011
2012         mutex_lock(&sdata->local->iflist_mtx);
2013         ieee80211_recalc_ps(sdata->local, -1);
2014         mutex_unlock(&sdata->local->iflist_mtx);
2015
2016         ifmgd->probe_send_count = 0;
2017         ieee80211_mgd_probe_ap_send(sdata);
2018  out:
2019         sdata_unlock(sdata);
2020 }
2021
2022 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2023                                           struct ieee80211_vif *vif)
2024 {
2025         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2026         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2027         struct cfg80211_bss *cbss;
2028         struct sk_buff *skb;
2029         const u8 *ssid;
2030         int ssid_len;
2031
2032         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2033                 return NULL;
2034
2035         sdata_assert_lock(sdata);
2036
2037         if (ifmgd->associated)
2038                 cbss = ifmgd->associated;
2039         else if (ifmgd->auth_data)
2040                 cbss = ifmgd->auth_data->bss;
2041         else if (ifmgd->assoc_data)
2042                 cbss = ifmgd->assoc_data->bss;
2043         else
2044                 return NULL;
2045
2046         rcu_read_lock();
2047         ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2048         if (WARN_ON_ONCE(ssid == NULL))
2049                 ssid_len = 0;
2050         else
2051                 ssid_len = ssid[1];
2052
2053         skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2054                                         (u32) -1, cbss->channel,
2055                                         ssid + 2, ssid_len,
2056                                         NULL, 0, true);
2057         rcu_read_unlock();
2058
2059         return skb;
2060 }
2061 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2062
2063 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2064 {
2065         struct ieee80211_local *local = sdata->local;
2066         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2067         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2068
2069         sdata_lock(sdata);
2070         if (!ifmgd->associated) {
2071                 sdata_unlock(sdata);
2072                 return;
2073         }
2074
2075         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2076                                WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2077                                true, frame_buf);
2078         ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2079
2080         mutex_lock(&local->mtx);
2081         sdata->vif.csa_active = false;
2082         if (!ieee80211_csa_needs_block_tx(local))
2083                 ieee80211_wake_queues_by_reason(&local->hw,
2084                                         IEEE80211_MAX_QUEUE_MAP,
2085                                         IEEE80211_QUEUE_STOP_REASON_CSA);
2086         mutex_unlock(&local->mtx);
2087
2088         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2089                               IEEE80211_DEAUTH_FRAME_LEN);
2090         sdata_unlock(sdata);
2091 }
2092
2093 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2094 {
2095         struct ieee80211_sub_if_data *sdata =
2096                 container_of(work, struct ieee80211_sub_if_data,
2097                              u.mgd.beacon_connection_loss_work);
2098         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2099         struct sta_info *sta;
2100
2101         if (ifmgd->associated) {
2102                 rcu_read_lock();
2103                 sta = sta_info_get(sdata, ifmgd->bssid);
2104                 if (sta)
2105                         sta->beacon_loss_count++;
2106                 rcu_read_unlock();
2107         }
2108
2109         if (ifmgd->connection_loss) {
2110                 sdata_info(sdata, "Connection to AP %pM lost\n",
2111                            ifmgd->bssid);
2112                 __ieee80211_disconnect(sdata);
2113         } else {
2114                 ieee80211_mgd_probe_ap(sdata, true);
2115         }
2116 }
2117
2118 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2119 {
2120         struct ieee80211_sub_if_data *sdata =
2121                 container_of(work, struct ieee80211_sub_if_data,
2122                              u.mgd.csa_connection_drop_work);
2123
2124         __ieee80211_disconnect(sdata);
2125 }
2126
2127 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2128 {
2129         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2130         struct ieee80211_hw *hw = &sdata->local->hw;
2131
2132         trace_api_beacon_loss(sdata);
2133
2134         sdata->u.mgd.connection_loss = false;
2135         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2136 }
2137 EXPORT_SYMBOL(ieee80211_beacon_loss);
2138
2139 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2140 {
2141         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2142         struct ieee80211_hw *hw = &sdata->local->hw;
2143
2144         trace_api_connection_loss(sdata);
2145
2146         sdata->u.mgd.connection_loss = true;
2147         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2148 }
2149 EXPORT_SYMBOL(ieee80211_connection_loss);
2150
2151
2152 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2153                                         bool assoc)
2154 {
2155         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2156
2157         sdata_assert_lock(sdata);
2158
2159         if (!assoc) {
2160                 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2161
2162                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2163                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2164                 sdata->u.mgd.flags = 0;
2165                 mutex_lock(&sdata->local->mtx);
2166                 ieee80211_vif_release_channel(sdata);
2167                 mutex_unlock(&sdata->local->mtx);
2168         }
2169
2170         cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2171         kfree(auth_data);
2172         sdata->u.mgd.auth_data = NULL;
2173 }
2174
2175 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2176                                      struct ieee80211_mgmt *mgmt, size_t len)
2177 {
2178         struct ieee80211_local *local = sdata->local;
2179         struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2180         u8 *pos;
2181         struct ieee802_11_elems elems;
2182         u32 tx_flags = 0;
2183
2184         pos = mgmt->u.auth.variable;
2185         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2186         if (!elems.challenge)
2187                 return;
2188         auth_data->expected_transaction = 4;
2189         drv_mgd_prepare_tx(sdata->local, sdata);
2190         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2191                 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2192                            IEEE80211_TX_INTFL_MLME_CONN_TX;
2193         ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2194                             elems.challenge - 2, elems.challenge_len + 2,
2195                             auth_data->bss->bssid, auth_data->bss->bssid,
2196                             auth_data->key, auth_data->key_len,
2197                             auth_data->key_idx, tx_flags);
2198 }
2199
2200 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2201                                    struct ieee80211_mgmt *mgmt, size_t len)
2202 {
2203         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2204         u8 bssid[ETH_ALEN];
2205         u16 auth_alg, auth_transaction, status_code;
2206         struct sta_info *sta;
2207
2208         sdata_assert_lock(sdata);
2209
2210         if (len < 24 + 6)
2211                 return;
2212
2213         if (!ifmgd->auth_data || ifmgd->auth_data->done)
2214                 return;
2215
2216         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2217
2218         if (!ether_addr_equal(bssid, mgmt->bssid))
2219                 return;
2220
2221         auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2222         auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2223         status_code = le16_to_cpu(mgmt->u.auth.status_code);
2224
2225         if (auth_alg != ifmgd->auth_data->algorithm ||
2226             auth_transaction != ifmgd->auth_data->expected_transaction) {
2227                 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2228                            mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2229                            auth_transaction,
2230                            ifmgd->auth_data->expected_transaction);
2231                 return;
2232         }
2233
2234         if (status_code != WLAN_STATUS_SUCCESS) {
2235                 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2236                            mgmt->sa, status_code);
2237                 ieee80211_destroy_auth_data(sdata, false);
2238                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2239                 return;
2240         }
2241
2242         switch (ifmgd->auth_data->algorithm) {
2243         case WLAN_AUTH_OPEN:
2244         case WLAN_AUTH_LEAP:
2245         case WLAN_AUTH_FT:
2246         case WLAN_AUTH_SAE:
2247                 break;
2248         case WLAN_AUTH_SHARED_KEY:
2249                 if (ifmgd->auth_data->expected_transaction != 4) {
2250                         ieee80211_auth_challenge(sdata, mgmt, len);
2251                         /* need another frame */
2252                         return;
2253                 }
2254                 break;
2255         default:
2256                 WARN_ONCE(1, "invalid auth alg %d",
2257                           ifmgd->auth_data->algorithm);
2258                 return;
2259         }
2260
2261         sdata_info(sdata, "authenticated\n");
2262         ifmgd->auth_data->done = true;
2263         ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2264         ifmgd->auth_data->timeout_started = true;
2265         run_again(sdata, ifmgd->auth_data->timeout);
2266
2267         if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2268             ifmgd->auth_data->expected_transaction != 2) {
2269                 /*
2270                  * Report auth frame to user space for processing since another
2271                  * round of Authentication frames is still needed.
2272                  */
2273                 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2274                 return;
2275         }
2276
2277         /* move station state to auth */
2278         mutex_lock(&sdata->local->sta_mtx);
2279         sta = sta_info_get(sdata, bssid);
2280         if (!sta) {
2281                 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2282                 goto out_err;
2283         }
2284         if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2285                 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2286                 goto out_err;
2287         }
2288         mutex_unlock(&sdata->local->sta_mtx);
2289
2290         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2291         return;
2292  out_err:
2293         mutex_unlock(&sdata->local->sta_mtx);
2294         /* ignore frame -- wait for timeout */
2295 }
2296
2297 #define case_WLAN(type) \
2298         case WLAN_REASON_##type: return #type
2299
2300 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2301 {
2302         switch (reason_code) {
2303         case_WLAN(UNSPECIFIED);
2304         case_WLAN(PREV_AUTH_NOT_VALID);
2305         case_WLAN(DEAUTH_LEAVING);
2306         case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2307         case_WLAN(DISASSOC_AP_BUSY);
2308         case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2309         case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2310         case_WLAN(DISASSOC_STA_HAS_LEFT);
2311         case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2312         case_WLAN(DISASSOC_BAD_POWER);
2313         case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2314         case_WLAN(INVALID_IE);
2315         case_WLAN(MIC_FAILURE);
2316         case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2317         case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2318         case_WLAN(IE_DIFFERENT);
2319         case_WLAN(INVALID_GROUP_CIPHER);
2320         case_WLAN(INVALID_PAIRWISE_CIPHER);
2321         case_WLAN(INVALID_AKMP);
2322         case_WLAN(UNSUPP_RSN_VERSION);
2323         case_WLAN(INVALID_RSN_IE_CAP);
2324         case_WLAN(IEEE8021X_FAILED);
2325         case_WLAN(CIPHER_SUITE_REJECTED);
2326         case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2327         case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2328         case_WLAN(DISASSOC_LOW_ACK);
2329         case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2330         case_WLAN(QSTA_LEAVE_QBSS);
2331         case_WLAN(QSTA_NOT_USE);
2332         case_WLAN(QSTA_REQUIRE_SETUP);
2333         case_WLAN(QSTA_TIMEOUT);
2334         case_WLAN(QSTA_CIPHER_NOT_SUPP);
2335         case_WLAN(MESH_PEER_CANCELED);
2336         case_WLAN(MESH_MAX_PEERS);
2337         case_WLAN(MESH_CONFIG);
2338         case_WLAN(MESH_CLOSE);
2339         case_WLAN(MESH_MAX_RETRIES);
2340         case_WLAN(MESH_CONFIRM_TIMEOUT);
2341         case_WLAN(MESH_INVALID_GTK);
2342         case_WLAN(MESH_INCONSISTENT_PARAM);
2343         case_WLAN(MESH_INVALID_SECURITY);
2344         case_WLAN(MESH_PATH_ERROR);
2345         case_WLAN(MESH_PATH_NOFORWARD);
2346         case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2347         case_WLAN(MAC_EXISTS_IN_MBSS);
2348         case_WLAN(MESH_CHAN_REGULATORY);
2349         case_WLAN(MESH_CHAN);
2350         default: return "<unknown>";
2351         }
2352 }
2353
2354 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2355                                      struct ieee80211_mgmt *mgmt, size_t len)
2356 {
2357         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2358         const u8 *bssid = NULL;
2359         u16 reason_code;
2360
2361         sdata_assert_lock(sdata);
2362
2363         if (len < 24 + 2)
2364                 return;
2365
2366         if (!ifmgd->associated ||
2367             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2368                 return;
2369
2370         bssid = ifmgd->associated->bssid;
2371
2372         reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2373
2374         sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2375                    bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2376
2377         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2378
2379         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2380 }
2381
2382
2383 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2384                                        struct ieee80211_mgmt *mgmt, size_t len)
2385 {
2386         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2387         u16 reason_code;
2388
2389         sdata_assert_lock(sdata);
2390
2391         if (len < 24 + 2)
2392                 return;
2393
2394         if (!ifmgd->associated ||
2395             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2396                 return;
2397
2398         reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2399
2400         sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2401                    mgmt->sa, reason_code);
2402
2403         ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2404
2405         cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2406 }
2407
2408 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2409                                 u8 *supp_rates, unsigned int supp_rates_len,
2410                                 u32 *rates, u32 *basic_rates,
2411                                 bool *have_higher_than_11mbit,
2412                                 int *min_rate, int *min_rate_index,
2413                                 int shift, u32 rate_flags)
2414 {
2415         int i, j;
2416
2417         for (i = 0; i < supp_rates_len; i++) {
2418                 int rate = supp_rates[i] & 0x7f;
2419                 bool is_basic = !!(supp_rates[i] & 0x80);
2420
2421                 if ((rate * 5 * (1 << shift)) > 110)
2422                         *have_higher_than_11mbit = true;
2423
2424                 /*
2425                  * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2426                  * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2427                  *
2428                  * Note: Even through the membership selector and the basic
2429                  *       rate flag share the same bit, they are not exactly
2430                  *       the same.
2431                  */
2432                 if (!!(supp_rates[i] & 0x80) &&
2433                     (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2434                         continue;
2435
2436                 for (j = 0; j < sband->n_bitrates; j++) {
2437                         struct ieee80211_rate *br;
2438                         int brate;
2439
2440                         br = &sband->bitrates[j];
2441                         if ((rate_flags & br->flags) != rate_flags)
2442                                 continue;
2443
2444                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2445                         if (brate == rate) {
2446                                 *rates |= BIT(j);
2447                                 if (is_basic)
2448                                         *basic_rates |= BIT(j);
2449                                 if ((rate * 5) < *min_rate) {
2450                                         *min_rate = rate * 5;
2451                                         *min_rate_index = j;
2452                                 }
2453                                 break;
2454                         }
2455                 }
2456         }
2457 }
2458
2459 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2460                                          bool assoc)
2461 {
2462         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2463
2464         sdata_assert_lock(sdata);
2465
2466         if (!assoc) {
2467                 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2468
2469                 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2470                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2471                 sdata->u.mgd.flags = 0;
2472                 mutex_lock(&sdata->local->mtx);
2473                 ieee80211_vif_release_channel(sdata);
2474                 mutex_unlock(&sdata->local->mtx);
2475         }
2476
2477         kfree(assoc_data);
2478         sdata->u.mgd.assoc_data = NULL;
2479 }
2480
2481 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2482                                     struct cfg80211_bss *cbss,
2483                                     struct ieee80211_mgmt *mgmt, size_t len)
2484 {
2485         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2486         struct ieee80211_local *local = sdata->local;
2487         struct ieee80211_supported_band *sband;
2488         struct sta_info *sta;
2489         u8 *pos;
2490         u16 capab_info, aid;
2491         struct ieee802_11_elems elems;
2492         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2493         const struct cfg80211_bss_ies *bss_ies = NULL;
2494         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2495         u32 changed = 0;
2496         int err;
2497         bool ret;
2498
2499         /* AssocResp and ReassocResp have identical structure */
2500
2501         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2502         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2503
2504         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2505                 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2506                            aid);
2507         aid &= ~(BIT(15) | BIT(14));
2508
2509         ifmgd->broken_ap = false;
2510
2511         if (aid == 0 || aid > IEEE80211_MAX_AID) {
2512                 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2513                            aid);
2514                 aid = 0;
2515                 ifmgd->broken_ap = true;
2516         }
2517
2518         pos = mgmt->u.assoc_resp.variable;
2519         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2520
2521         if (!elems.supp_rates) {
2522                 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2523                 return false;
2524         }
2525
2526         ifmgd->aid = aid;
2527
2528         /*
2529          * Some APs are erroneously not including some information in their
2530          * (re)association response frames. Try to recover by using the data
2531          * from the beacon or probe response. This seems to afflict mobile
2532          * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2533          * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2534          */
2535         if ((assoc_data->wmm && !elems.wmm_param) ||
2536             (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2537              (!elems.ht_cap_elem || !elems.ht_operation)) ||
2538             (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2539              (!elems.vht_cap_elem || !elems.vht_operation))) {
2540                 const struct cfg80211_bss_ies *ies;
2541                 struct ieee802_11_elems bss_elems;
2542
2543                 rcu_read_lock();
2544                 ies = rcu_dereference(cbss->ies);
2545                 if (ies)
2546                         bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2547                                           GFP_ATOMIC);
2548                 rcu_read_unlock();
2549                 if (!bss_ies)
2550                         return false;
2551
2552                 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2553                                        false, &bss_elems);
2554                 if (assoc_data->wmm &&
2555                     !elems.wmm_param && bss_elems.wmm_param) {
2556                         elems.wmm_param = bss_elems.wmm_param;
2557                         sdata_info(sdata,
2558                                    "AP bug: WMM param missing from AssocResp\n");
2559                 }
2560
2561                 /*
2562                  * Also check if we requested HT/VHT, otherwise the AP doesn't
2563                  * have to include the IEs in the (re)association response.
2564                  */
2565                 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2566                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2567                         elems.ht_cap_elem = bss_elems.ht_cap_elem;
2568                         sdata_info(sdata,
2569                                    "AP bug: HT capability missing from AssocResp\n");
2570                 }
2571                 if (!elems.ht_operation && bss_elems.ht_operation &&
2572                     !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2573                         elems.ht_operation = bss_elems.ht_operation;
2574                         sdata_info(sdata,
2575                                    "AP bug: HT operation missing from AssocResp\n");
2576                 }
2577                 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2578                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2579                         elems.vht_cap_elem = bss_elems.vht_cap_elem;
2580                         sdata_info(sdata,
2581                                    "AP bug: VHT capa missing from AssocResp\n");
2582                 }
2583                 if (!elems.vht_operation && bss_elems.vht_operation &&
2584                     !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2585                         elems.vht_operation = bss_elems.vht_operation;
2586                         sdata_info(sdata,
2587                                    "AP bug: VHT operation missing from AssocResp\n");
2588                 }
2589         }
2590
2591         /*
2592          * We previously checked these in the beacon/probe response, so
2593          * they should be present here. This is just a safety net.
2594          */
2595         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2596             (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2597                 sdata_info(sdata,
2598                            "HT AP is missing WMM params or HT capability/operation\n");
2599                 ret = false;
2600                 goto out;
2601         }
2602
2603         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2604             (!elems.vht_cap_elem || !elems.vht_operation)) {
2605                 sdata_info(sdata,
2606                            "VHT AP is missing VHT capability/operation\n");
2607                 ret = false;
2608                 goto out;
2609         }
2610
2611         mutex_lock(&sdata->local->sta_mtx);
2612         /*
2613          * station info was already allocated and inserted before
2614          * the association and should be available to us
2615          */
2616         sta = sta_info_get(sdata, cbss->bssid);
2617         if (WARN_ON(!sta)) {
2618                 mutex_unlock(&sdata->local->sta_mtx);
2619                 ret = false;
2620                 goto out;
2621         }
2622
2623         sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2624
2625         /* Set up internal HT/VHT capabilities */
2626         if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2627                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2628                                                   elems.ht_cap_elem, sta);
2629
2630         if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2631                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2632                                                     elems.vht_cap_elem, sta);
2633
2634         /*
2635          * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2636          * in their association response, so ignore that data for our own
2637          * configuration. If it changed since the last beacon, we'll get the
2638          * next beacon and update then.
2639          */
2640
2641         /*
2642          * If an operating mode notification IE is present, override the
2643          * NSS calculation (that would be done in rate_control_rate_init())
2644          * and use the # of streams from that element.
2645          */
2646         if (elems.opmode_notif &&
2647             !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2648                 u8 nss;
2649
2650                 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2651                 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2652                 nss += 1;
2653                 sta->sta.rx_nss = nss;
2654         }
2655
2656         rate_control_rate_init(sta);
2657
2658         if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2659                 set_sta_flag(sta, WLAN_STA_MFP);
2660
2661         if (elems.wmm_param)
2662                 set_sta_flag(sta, WLAN_STA_WME);
2663
2664         err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2665         if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2666                 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2667         if (err) {
2668                 sdata_info(sdata,
2669                            "failed to move station %pM to desired state\n",
2670                            sta->sta.addr);
2671                 WARN_ON(__sta_info_destroy(sta));
2672                 mutex_unlock(&sdata->local->sta_mtx);
2673                 ret = false;
2674                 goto out;
2675         }
2676
2677         mutex_unlock(&sdata->local->sta_mtx);
2678
2679         /*
2680          * Always handle WMM once after association regardless
2681          * of the first value the AP uses. Setting -1 here has
2682          * that effect because the AP values is an unsigned
2683          * 4-bit value.
2684          */
2685         ifmgd->wmm_last_param_set = -1;
2686
2687         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2688                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2689                                          elems.wmm_param_len);
2690         else
2691                 ieee80211_set_wmm_default(sdata, false);
2692         changed |= BSS_CHANGED_QOS;
2693
2694         /* set AID and assoc capability,
2695          * ieee80211_set_associated() will tell the driver */
2696         bss_conf->aid = aid;
2697         bss_conf->assoc_capability = capab_info;
2698         ieee80211_set_associated(sdata, cbss, changed);
2699
2700         /*
2701          * If we're using 4-addr mode, let the AP know that we're
2702          * doing so, so that it can create the STA VLAN on its side
2703          */
2704         if (ifmgd->use_4addr)
2705                 ieee80211_send_4addr_nullfunc(local, sdata);
2706
2707         /*
2708          * Start timer to probe the connection to the AP now.
2709          * Also start the timer that will detect beacon loss.
2710          */
2711         ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2712         ieee80211_sta_reset_beacon_monitor(sdata);
2713
2714         ret = true;
2715  out:
2716         kfree(bss_ies);
2717         return ret;
2718 }
2719
2720 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2721                                          struct ieee80211_mgmt *mgmt,
2722                                          size_t len)
2723 {
2724         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2725         struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2726         u16 capab_info, status_code, aid;
2727         struct ieee802_11_elems elems;
2728         u8 *pos;
2729         bool reassoc;
2730         struct cfg80211_bss *bss;
2731
2732         sdata_assert_lock(sdata);
2733
2734         if (!assoc_data)
2735                 return;
2736         if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2737                 return;
2738
2739         /*
2740          * AssocResp and ReassocResp have identical structure, so process both
2741          * of them in this function.
2742          */
2743
2744         if (len < 24 + 6)
2745                 return;
2746
2747         reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2748         capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2749         status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2750         aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2751
2752         sdata_info(sdata,
2753                    "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2754                    reassoc ? "Rea" : "A", mgmt->sa,
2755                    capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2756
2757         pos = mgmt->u.assoc_resp.variable;
2758         ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2759
2760         if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2761             elems.timeout_int &&
2762             elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2763                 u32 tu, ms;
2764                 tu = le32_to_cpu(elems.timeout_int->value);
2765                 ms = tu * 1024 / 1000;
2766                 sdata_info(sdata,
2767                            "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2768                            mgmt->sa, tu, ms);
2769                 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2770                 assoc_data->timeout_started = true;
2771                 if (ms > IEEE80211_ASSOC_TIMEOUT)
2772                         run_again(sdata, assoc_data->timeout);
2773                 return;
2774         }
2775
2776         bss = assoc_data->bss;
2777
2778         if (status_code != WLAN_STATUS_SUCCESS) {
2779                 sdata_info(sdata, "%pM denied association (code=%d)\n",
2780                            mgmt->sa, status_code);
2781                 ieee80211_destroy_assoc_data(sdata, false);
2782         } else {
2783                 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2784                         /* oops -- internal error -- send timeout for now */
2785                         ieee80211_destroy_assoc_data(sdata, false);
2786                         cfg80211_assoc_timeout(sdata->dev, bss);
2787                         return;
2788                 }
2789                 sdata_info(sdata, "associated\n");
2790
2791                 /*
2792                  * destroy assoc_data afterwards, as otherwise an idle
2793                  * recalc after assoc_data is NULL but before associated
2794                  * is set can cause the interface to go idle
2795                  */
2796                 ieee80211_destroy_assoc_data(sdata, true);
2797         }
2798
2799         cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2800 }
2801
2802 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2803                                   struct ieee80211_mgmt *mgmt, size_t len,
2804                                   struct ieee80211_rx_status *rx_status,
2805                                   struct ieee802_11_elems *elems)
2806 {
2807         struct ieee80211_local *local = sdata->local;
2808         struct ieee80211_bss *bss;
2809         struct ieee80211_channel *channel;
2810
2811         sdata_assert_lock(sdata);
2812
2813         channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
2814         if (!channel)
2815                 return;
2816
2817         bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2818                                         channel);
2819         if (bss) {
2820                 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2821                 ieee80211_rx_bss_put(local, bss);
2822         }
2823 }
2824
2825
2826 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2827                                          struct sk_buff *skb)
2828 {
2829         struct ieee80211_mgmt *mgmt = (void *)skb->data;
2830         struct ieee80211_if_managed *ifmgd;
2831         struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2832         size_t baselen, len = skb->len;
2833         struct ieee802_11_elems elems;
2834
2835         ifmgd = &sdata->u.mgd;
2836
2837         sdata_assert_lock(sdata);
2838
2839         if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2840                 return; /* ignore ProbeResp to foreign address */
2841
2842         baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2843         if (baselen > len)
2844                 return;
2845
2846         ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2847                                false, &elems);
2848
2849         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2850
2851         if (ifmgd->associated &&
2852             ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2853                 ieee80211_reset_ap_probe(sdata);
2854
2855         if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2856             ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2857                 /* got probe response, continue with auth */
2858                 sdata_info(sdata, "direct probe responded\n");
2859                 ifmgd->auth_data->tries = 0;
2860                 ifmgd->auth_data->timeout = jiffies;
2861                 ifmgd->auth_data->timeout_started = true;
2862                 run_again(sdata, ifmgd->auth_data->timeout);
2863         }
2864 }
2865
2866 /*
2867  * This is the canonical list of information elements we care about,
2868  * the filter code also gives us all changes to the Microsoft OUI
2869  * (00:50:F2) vendor IE which is used for WMM which we need to track.
2870  *
2871  * We implement beacon filtering in software since that means we can
2872  * avoid processing the frame here and in cfg80211, and userspace
2873  * will not be able to tell whether the hardware supports it or not.
2874  *
2875  * XXX: This list needs to be dynamic -- userspace needs to be able to
2876  *      add items it requires. It also needs to be able to tell us to
2877  *      look out for other vendor IEs.
2878  */
2879 static const u64 care_about_ies =
2880         (1ULL << WLAN_EID_COUNTRY) |
2881         (1ULL << WLAN_EID_ERP_INFO) |
2882         (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2883         (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2884         (1ULL << WLAN_EID_HT_CAPABILITY) |
2885         (1ULL << WLAN_EID_HT_OPERATION);
2886
2887 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2888                                      struct ieee80211_mgmt *mgmt, size_t len,
2889                                      struct ieee80211_rx_status *rx_status)
2890 {
2891         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2892         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2893         size_t baselen;
2894         struct ieee802_11_elems elems;
2895         struct ieee80211_local *local = sdata->local;
2896         struct ieee80211_chanctx_conf *chanctx_conf;
2897         struct ieee80211_channel *chan;
2898         struct sta_info *sta;
2899         u32 changed = 0;
2900         bool erp_valid;
2901         u8 erp_value = 0;
2902         u32 ncrc;
2903         u8 *bssid;
2904         u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2905
2906         sdata_assert_lock(sdata);
2907
2908         /* Process beacon from the current BSS */
2909         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2910         if (baselen > len)
2911                 return;
2912
2913         rcu_read_lock();
2914         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2915         if (!chanctx_conf) {
2916                 rcu_read_unlock();
2917                 return;
2918         }
2919
2920         if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2921                 rcu_read_unlock();
2922                 return;
2923         }
2924         chan = chanctx_conf->def.chan;
2925         rcu_read_unlock();
2926
2927         if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2928             ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2929                 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2930                                        len - baselen, false, &elems);
2931
2932                 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2933                 if (elems.tim && !elems.parse_error) {
2934                         const struct ieee80211_tim_ie *tim_ie = elems.tim;
2935                         ifmgd->dtim_period = tim_ie->dtim_period;
2936                 }
2937                 ifmgd->have_beacon = true;
2938                 ifmgd->assoc_data->need_beacon = false;
2939                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2940                         sdata->vif.bss_conf.sync_tsf =
2941                                 le64_to_cpu(mgmt->u.beacon.timestamp);
2942                         sdata->vif.bss_conf.sync_device_ts =
2943                                 rx_status->device_timestamp;
2944                         if (elems.tim)
2945                                 sdata->vif.bss_conf.sync_dtim_count =
2946                                         elems.tim->dtim_count;
2947                         else
2948                                 sdata->vif.bss_conf.sync_dtim_count = 0;
2949                 }
2950                 /* continue assoc process */
2951                 ifmgd->assoc_data->timeout = jiffies;
2952                 ifmgd->assoc_data->timeout_started = true;
2953                 run_again(sdata, ifmgd->assoc_data->timeout);
2954                 return;
2955         }
2956
2957         if (!ifmgd->associated ||
2958             !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2959                 return;
2960         bssid = ifmgd->associated->bssid;
2961
2962         /* Track average RSSI from the Beacon frames of the current AP */
2963         ifmgd->last_beacon_signal = rx_status->signal;
2964         if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2965                 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2966                 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2967                 ifmgd->last_cqm_event_signal = 0;
2968                 ifmgd->count_beacon_signal = 1;
2969                 ifmgd->last_ave_beacon_signal = 0;
2970         } else {
2971                 ifmgd->ave_beacon_signal =
2972                         (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2973                          (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2974                          ifmgd->ave_beacon_signal) / 16;
2975                 ifmgd->count_beacon_signal++;
2976         }
2977
2978         if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2979             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2980                 int sig = ifmgd->ave_beacon_signal;
2981                 int last_sig = ifmgd->last_ave_beacon_signal;
2982
2983                 /*
2984                  * if signal crosses either of the boundaries, invoke callback
2985                  * with appropriate parameters
2986                  */
2987                 if (sig > ifmgd->rssi_max_thold &&
2988                     (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2989                         ifmgd->last_ave_beacon_signal = sig;
2990                         drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
2991                 } else if (sig < ifmgd->rssi_min_thold &&
2992                            (last_sig >= ifmgd->rssi_max_thold ||
2993                            last_sig == 0)) {
2994                         ifmgd->last_ave_beacon_signal = sig;
2995                         drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
2996                 }
2997         }
2998
2999         if (bss_conf->cqm_rssi_thold &&
3000             ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3001             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3002                 int sig = ifmgd->ave_beacon_signal / 16;
3003                 int last_event = ifmgd->last_cqm_event_signal;
3004                 int thold = bss_conf->cqm_rssi_thold;
3005                 int hyst = bss_conf->cqm_rssi_hyst;
3006                 if (sig < thold &&
3007                     (last_event == 0 || sig < last_event - hyst)) {
3008                         ifmgd->last_cqm_event_signal = sig;
3009                         ieee80211_cqm_rssi_notify(
3010                                 &sdata->vif,
3011                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3012                                 GFP_KERNEL);
3013                 } else if (sig > thold &&
3014                            (last_event == 0 || sig > last_event + hyst)) {
3015                         ifmgd->last_cqm_event_signal = sig;
3016                         ieee80211_cqm_rssi_notify(
3017                                 &sdata->vif,
3018                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3019                                 GFP_KERNEL);
3020                 }
3021         }
3022
3023         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3024                 mlme_dbg_ratelimited(sdata,
3025                                      "cancelling AP probe due to a received beacon\n");
3026                 ieee80211_reset_ap_probe(sdata);
3027         }
3028
3029         /*
3030          * Push the beacon loss detection into the future since
3031          * we are processing a beacon from the AP just now.
3032          */
3033         ieee80211_sta_reset_beacon_monitor(sdata);
3034
3035         ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3036         ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3037                                           len - baselen, false, &elems,
3038                                           care_about_ies, ncrc);
3039
3040         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3041                 bool directed_tim = ieee80211_check_tim(elems.tim,
3042                                                         elems.tim_len,
3043                                                         ifmgd->aid);
3044                 if (directed_tim) {
3045                         if (local->hw.conf.dynamic_ps_timeout > 0) {
3046                                 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3047                                         local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3048                                         ieee80211_hw_config(local,
3049                                                             IEEE80211_CONF_CHANGE_PS);
3050                                 }
3051                                 ieee80211_send_nullfunc(local, sdata, 0);
3052                         } else if (!local->pspolling && sdata->u.mgd.powersave) {
3053                                 local->pspolling = true;
3054
3055                                 /*
3056                                  * Here is assumed that the driver will be
3057                                  * able to send ps-poll frame and receive a
3058                                  * response even though power save mode is
3059                                  * enabled, but some drivers might require
3060                                  * to disable power save here. This needs
3061                                  * to be investigated.
3062                                  */
3063                                 ieee80211_send_pspoll(local, sdata);
3064                         }
3065                 }
3066         }
3067
3068         if (sdata->vif.p2p) {
3069                 struct ieee80211_p2p_noa_attr noa = {};
3070                 int ret;
3071
3072                 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3073                                             len - baselen,
3074                                             IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3075                                             (u8 *) &noa, sizeof(noa));
3076                 if (ret >= 2) {
3077                         if (sdata->u.mgd.p2p_noa_index != noa.index) {
3078                                 /* valid noa_attr and index changed */
3079                                 sdata->u.mgd.p2p_noa_index = noa.index;
3080                                 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3081                                 changed |= BSS_CHANGED_P2P_PS;
3082                                 /*
3083                                  * make sure we update all information, the CRC
3084                                  * mechanism doesn't look at P2P attributes.
3085                                  */
3086                                 ifmgd->beacon_crc_valid = false;
3087                         }
3088                 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3089                         /* noa_attr not found and we had valid noa_attr before */
3090                         sdata->u.mgd.p2p_noa_index = -1;
3091                         memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3092                         changed |= BSS_CHANGED_P2P_PS;
3093                         ifmgd->beacon_crc_valid = false;
3094                 }
3095         }
3096
3097         if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3098                 return;
3099         ifmgd->beacon_crc = ncrc;
3100         ifmgd->beacon_crc_valid = true;
3101
3102         ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3103
3104         ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3105                                          &elems, true);
3106
3107         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3108             ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3109                                      elems.wmm_param_len))
3110                 changed |= BSS_CHANGED_QOS;
3111
3112         /*
3113          * If we haven't had a beacon before, tell the driver about the
3114          * DTIM period (and beacon timing if desired) now.
3115          */
3116         if (!ifmgd->have_beacon) {
3117                 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3118                 if (elems.tim)
3119                         bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3120                 else
3121                         bss_conf->dtim_period = 1;
3122
3123                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3124                         sdata->vif.bss_conf.sync_tsf =
3125                                 le64_to_cpu(mgmt->u.beacon.timestamp);
3126                         sdata->vif.bss_conf.sync_device_ts =
3127                                 rx_status->device_timestamp;
3128                         if (elems.tim)
3129                                 sdata->vif.bss_conf.sync_dtim_count =
3130                                         elems.tim->dtim_count;
3131                         else
3132                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3133                 }
3134
3135                 changed |= BSS_CHANGED_BEACON_INFO;
3136                 ifmgd->have_beacon = true;
3137
3138                 mutex_lock(&local->iflist_mtx);
3139                 ieee80211_recalc_ps(local, -1);
3140                 mutex_unlock(&local->iflist_mtx);
3141
3142                 ieee80211_recalc_ps_vif(sdata);
3143         }
3144
3145         if (elems.erp_info) {
3146                 erp_valid = true;
3147                 erp_value = elems.erp_info[0];
3148         } else {
3149                 erp_valid = false;
3150         }
3151         changed |= ieee80211_handle_bss_capability(sdata,
3152                         le16_to_cpu(mgmt->u.beacon.capab_info),
3153                         erp_valid, erp_value);
3154
3155         mutex_lock(&local->sta_mtx);
3156         sta = sta_info_get(sdata, bssid);
3157
3158         if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3159                                 elems.vht_operation, bssid, &changed)) {
3160                 mutex_unlock(&local->sta_mtx);
3161                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3162                                        WLAN_REASON_DEAUTH_LEAVING,
3163                                        true, deauth_buf);
3164                 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3165                                       sizeof(deauth_buf));
3166                 return;
3167         }
3168
3169         if (sta && elems.opmode_notif)
3170                 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3171                                             rx_status->band, true);
3172         mutex_unlock(&local->sta_mtx);
3173
3174         if (elems.country_elem && elems.pwr_constr_elem &&
3175             mgmt->u.probe_resp.capab_info &
3176                                 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3177                 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3178                                                        elems.country_elem,
3179                                                        elems.country_elem_len,
3180                                                        elems.pwr_constr_elem);
3181
3182         ieee80211_bss_info_change_notify(sdata, changed);
3183 }
3184
3185 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3186                                   struct sk_buff *skb)
3187 {
3188         struct ieee80211_rx_status *rx_status;
3189         struct ieee80211_mgmt *mgmt;
3190         u16 fc;
3191         struct ieee802_11_elems elems;
3192         int ies_len;
3193
3194         rx_status = (struct ieee80211_rx_status *) skb->cb;
3195         mgmt = (struct ieee80211_mgmt *) skb->data;
3196         fc = le16_to_cpu(mgmt->frame_control);
3197
3198         sdata_lock(sdata);
3199
3200         switch (fc & IEEE80211_FCTL_STYPE) {
3201         case IEEE80211_STYPE_BEACON:
3202                 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3203                 break;
3204         case IEEE80211_STYPE_PROBE_RESP:
3205                 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3206                 break;
3207         case IEEE80211_STYPE_AUTH:
3208                 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3209                 break;
3210         case IEEE80211_STYPE_DEAUTH:
3211                 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3212                 break;
3213         case IEEE80211_STYPE_DISASSOC:
3214                 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3215                 break;
3216         case IEEE80211_STYPE_ASSOC_RESP:
3217         case IEEE80211_STYPE_REASSOC_RESP:
3218                 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3219                 break;
3220         case IEEE80211_STYPE_ACTION:
3221                 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3222                         ies_len = skb->len -
3223                                   offsetof(struct ieee80211_mgmt,
3224                                            u.action.u.chan_switch.variable);
3225
3226                         if (ies_len < 0)
3227                                 break;
3228
3229                         ieee802_11_parse_elems(
3230                                 mgmt->u.action.u.chan_switch.variable,
3231                                 ies_len, true, &elems);
3232
3233                         if (elems.parse_error)
3234                                 break;
3235
3236                         ieee80211_sta_process_chanswitch(sdata,
3237                                                          rx_status->mactime,
3238                                                          &elems, false);
3239                 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3240                         ies_len = skb->len -
3241                                   offsetof(struct ieee80211_mgmt,
3242                                            u.action.u.ext_chan_switch.variable);
3243
3244                         if (ies_len < 0)
3245                                 break;
3246
3247                         ieee802_11_parse_elems(
3248                                 mgmt->u.action.u.ext_chan_switch.variable,
3249                                 ies_len, true, &elems);
3250
3251                         if (elems.parse_error)
3252                                 break;
3253
3254                         /* for the handling code pretend this was also an IE */
3255                         elems.ext_chansw_ie =
3256                                 &mgmt->u.action.u.ext_chan_switch.data;
3257
3258                         ieee80211_sta_process_chanswitch(sdata,
3259                                                          rx_status->mactime,
3260                                                          &elems, false);
3261                 }
3262                 break;
3263         }
3264         sdata_unlock(sdata);
3265 }
3266
3267 static void ieee80211_sta_timer(unsigned long data)
3268 {
3269         struct ieee80211_sub_if_data *sdata =
3270                 (struct ieee80211_sub_if_data *) data;
3271
3272         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3273 }
3274
3275 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3276                                           u8 *bssid, u8 reason, bool tx)
3277 {
3278         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3279
3280         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3281                                tx, frame_buf);
3282
3283         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3284                               IEEE80211_DEAUTH_FRAME_LEN);
3285 }
3286
3287 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3288 {
3289         struct ieee80211_local *local = sdata->local;
3290         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3291         struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3292         u32 tx_flags = 0;
3293
3294         sdata_assert_lock(sdata);
3295
3296         if (WARN_ON_ONCE(!auth_data))
3297                 return -EINVAL;
3298
3299         auth_data->tries++;
3300
3301         if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3302                 sdata_info(sdata, "authentication with %pM timed out\n",
3303                            auth_data->bss->bssid);
3304
3305                 /*
3306                  * Most likely AP is not in the range so remove the
3307                  * bss struct for that AP.
3308                  */
3309                 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3310
3311                 return -ETIMEDOUT;
3312         }
3313
3314         drv_mgd_prepare_tx(local, sdata);
3315
3316         if (auth_data->bss->proberesp_ies) {
3317                 u16 trans = 1;
3318                 u16 status = 0;
3319
3320                 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3321                            auth_data->bss->bssid, auth_data->tries,
3322                            IEEE80211_AUTH_MAX_TRIES);
3323
3324                 auth_data->expected_transaction = 2;
3325
3326                 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3327                         trans = auth_data->sae_trans;
3328                         status = auth_data->sae_status;
3329                         auth_data->expected_transaction = trans;
3330                 }
3331
3332                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3333                         tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3334                                    IEEE80211_TX_INTFL_MLME_CONN_TX;
3335
3336                 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3337                                     auth_data->data, auth_data->data_len,
3338                                     auth_data->bss->bssid,
3339                                     auth_data->bss->bssid, NULL, 0, 0,
3340                                     tx_flags);
3341         } else {
3342                 const u8 *ssidie;
3343
3344                 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3345                            auth_data->bss->bssid, auth_data->tries,
3346                            IEEE80211_AUTH_MAX_TRIES);
3347
3348                 rcu_read_lock();
3349                 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3350                 if (!ssidie) {
3351                         rcu_read_unlock();
3352                         return -EINVAL;
3353                 }
3354                 /*
3355                  * Direct probe is sent to broadcast address as some APs
3356                  * will not answer to direct packet in unassociated state.
3357                  */
3358                 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3359                                          NULL, 0, (u32) -1, true, 0,
3360                                          auth_data->bss->channel, false);
3361                 rcu_read_unlock();
3362         }
3363
3364         if (tx_flags == 0) {
3365                 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3366                 auth_data->timeout_started = true;
3367                 run_again(sdata, auth_data->timeout);
3368         } else {
3369                 auth_data->timeout =
3370                         round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3371                 auth_data->timeout_started = true;
3372                 run_again(sdata, auth_data->timeout);
3373         }
3374
3375         return 0;
3376 }
3377
3378 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3379 {
3380         struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3381         struct ieee80211_local *local = sdata->local;
3382
3383         sdata_assert_lock(sdata);
3384
3385         assoc_data->tries++;
3386         if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3387                 sdata_info(sdata, "association with %pM timed out\n",
3388                            assoc_data->bss->bssid);
3389
3390                 /*
3391                  * Most likely AP is not in the range so remove the
3392                  * bss struct for that AP.
3393                  */
3394                 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3395
3396                 return -ETIMEDOUT;
3397         }
3398
3399         sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3400                    assoc_data->bss->bssid, assoc_data->tries,
3401                    IEEE80211_ASSOC_MAX_TRIES);
3402         ieee80211_send_assoc(sdata);
3403
3404         if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3405                 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3406                 assoc_data->timeout_started = true;
3407                 run_again(sdata, assoc_data->timeout);
3408         } else {
3409                 assoc_data->timeout =
3410                         round_jiffies_up(jiffies +
3411                                          IEEE80211_ASSOC_TIMEOUT_LONG);
3412                 assoc_data->timeout_started = true;
3413                 run_again(sdata, assoc_data->timeout);
3414         }
3415
3416         return 0;
3417 }
3418
3419 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3420                                   __le16 fc, bool acked)
3421 {
3422         struct ieee80211_local *local = sdata->local;
3423
3424         sdata->u.mgd.status_fc = fc;
3425         sdata->u.mgd.status_acked = acked;
3426         sdata->u.mgd.status_received = true;
3427
3428         ieee80211_queue_work(&local->hw, &sdata->work);
3429 }
3430
3431 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3432 {
3433         struct ieee80211_local *local = sdata->local;
3434         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3435
3436         sdata_lock(sdata);
3437
3438         if (ifmgd->status_received) {
3439                 __le16 fc = ifmgd->status_fc;
3440                 bool status_acked = ifmgd->status_acked;
3441
3442                 ifmgd->status_received = false;
3443                 if (ifmgd->auth_data &&
3444                     (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3445                         if (status_acked) {
3446                                 ifmgd->auth_data->timeout =
3447                                         jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3448                                 run_again(sdata, ifmgd->auth_data->timeout);
3449                         } else {
3450                                 ifmgd->auth_data->timeout = jiffies - 1;
3451                         }
3452                         ifmgd->auth_data->timeout_started = true;
3453                 } else if (ifmgd->assoc_data &&
3454                            (ieee80211_is_assoc_req(fc) ||
3455                             ieee80211_is_reassoc_req(fc))) {
3456                         if (status_acked) {
3457                                 ifmgd->assoc_data->timeout =
3458                                         jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3459                                 run_again(sdata, ifmgd->assoc_data->timeout);
3460                         } else {
3461                                 ifmgd->assoc_data->timeout = jiffies - 1;
3462                         }
3463                         ifmgd->assoc_data->timeout_started = true;
3464                 }
3465         }
3466
3467         if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3468             time_after(jiffies, ifmgd->auth_data->timeout)) {
3469                 if (ifmgd->auth_data->done) {
3470                         /*
3471                          * ok ... we waited for assoc but userspace didn't,
3472                          * so let's just kill the auth data
3473                          */
3474                         ieee80211_destroy_auth_data(sdata, false);
3475                 } else if (ieee80211_probe_auth(sdata)) {
3476                         u8 bssid[ETH_ALEN];
3477
3478                         memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3479
3480                         ieee80211_destroy_auth_data(sdata, false);
3481
3482                         cfg80211_auth_timeout(sdata->dev, bssid);
3483                 }
3484         } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3485                 run_again(sdata, ifmgd->auth_data->timeout);
3486
3487         if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3488             time_after(jiffies, ifmgd->assoc_data->timeout)) {
3489                 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3490                     ieee80211_do_assoc(sdata)) {
3491                         struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3492
3493                         ieee80211_destroy_assoc_data(sdata, false);
3494                         cfg80211_assoc_timeout(sdata->dev, bss);
3495                 }
3496         } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3497                 run_again(sdata, ifmgd->assoc_data->timeout);
3498
3499         if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3500             ifmgd->associated) {
3501                 u8 bssid[ETH_ALEN];
3502                 int max_tries;
3503
3504                 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3505
3506                 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3507                         max_tries = max_nullfunc_tries;
3508                 else
3509                         max_tries = max_probe_tries;
3510
3511                 /* ACK received for nullfunc probing frame */
3512                 if (!ifmgd->probe_send_count)
3513                         ieee80211_reset_ap_probe(sdata);
3514                 else if (ifmgd->nullfunc_failed) {
3515                         if (ifmgd->probe_send_count < max_tries) {
3516                                 mlme_dbg(sdata,
3517                                          "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3518                                          bssid, ifmgd->probe_send_count,
3519                                          max_tries);
3520                                 ieee80211_mgd_probe_ap_send(sdata);
3521                         } else {
3522                                 mlme_dbg(sdata,
3523                                          "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3524                                          bssid);
3525                                 ieee80211_sta_connection_lost(sdata, bssid,
3526                                         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3527                                         false);
3528                         }
3529                 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3530                         run_again(sdata, ifmgd->probe_timeout);
3531                 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3532                         mlme_dbg(sdata,
3533                                  "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3534                                  bssid, probe_wait_ms);
3535                         ieee80211_sta_connection_lost(sdata, bssid,
3536                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3537                 } else if (ifmgd->probe_send_count < max_tries) {
3538                         mlme_dbg(sdata,
3539                                  "No probe response from AP %pM after %dms, try %d/%i\n",
3540                                  bssid, probe_wait_ms,
3541                                  ifmgd->probe_send_count, max_tries);
3542                         ieee80211_mgd_probe_ap_send(sdata);
3543                 } else {
3544                         /*
3545                          * We actually lost the connection ... or did we?
3546                          * Let's make sure!
3547                          */
3548                         wiphy_debug(local->hw.wiphy,
3549                                     "%s: No probe response from AP %pM"
3550                                     " after %dms, disconnecting.\n",
3551                                     sdata->name,
3552                                     bssid, probe_wait_ms);
3553
3554                         ieee80211_sta_connection_lost(sdata, bssid,
3555                                 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3556                 }
3557         }
3558
3559         sdata_unlock(sdata);
3560 }
3561
3562 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3563 {
3564         struct ieee80211_sub_if_data *sdata =
3565                 (struct ieee80211_sub_if_data *) data;
3566         struct ieee80211_local *local = sdata->local;
3567
3568         if (local->quiescing)
3569                 return;
3570
3571         if (sdata->vif.csa_active)
3572                 return;
3573
3574         sdata->u.mgd.connection_loss = false;
3575         ieee80211_queue_work(&sdata->local->hw,
3576                              &sdata->u.mgd.beacon_connection_loss_work);
3577 }
3578
3579 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3580 {
3581         struct ieee80211_sub_if_data *sdata =
3582                 (struct ieee80211_sub_if_data *) data;
3583         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3584         struct ieee80211_local *local = sdata->local;
3585
3586         if (local->quiescing)
3587                 return;
3588
3589         if (sdata->vif.csa_active)
3590                 return;
3591
3592         ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3593 }
3594
3595 static void ieee80211_sta_monitor_work(struct work_struct *work)
3596 {
3597         struct ieee80211_sub_if_data *sdata =
3598                 container_of(work, struct ieee80211_sub_if_data,
3599                              u.mgd.monitor_work);
3600
3601         ieee80211_mgd_probe_ap(sdata, false);
3602 }
3603
3604 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3605 {
3606         u32 flags;
3607
3608         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3609                 __ieee80211_stop_poll(sdata);
3610
3611                 /* let's probe the connection once */
3612                 flags = sdata->local->hw.flags;
3613                 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3614                         ieee80211_queue_work(&sdata->local->hw,
3615                                              &sdata->u.mgd.monitor_work);
3616                 /* and do all the other regular work too */
3617                 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3618         }
3619 }
3620
3621 #ifdef CONFIG_PM
3622 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3623 {
3624         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3625         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3626
3627         sdata_lock(sdata);
3628
3629         if (ifmgd->auth_data || ifmgd->assoc_data) {
3630                 const u8 *bssid = ifmgd->auth_data ?
3631                                 ifmgd->auth_data->bss->bssid :
3632                                 ifmgd->assoc_data->bss->bssid;
3633
3634                 /*
3635                  * If we are trying to authenticate / associate while suspending,
3636                  * cfg80211 won't know and won't actually abort those attempts,
3637                  * thus we need to do that ourselves.
3638                  */
3639                 ieee80211_send_deauth_disassoc(sdata, bssid,
3640                                                IEEE80211_STYPE_DEAUTH,
3641                                                WLAN_REASON_DEAUTH_LEAVING,
3642                                                false, frame_buf);
3643                 if (ifmgd->assoc_data)
3644                         ieee80211_destroy_assoc_data(sdata, false);
3645                 if (ifmgd->auth_data)
3646                         ieee80211_destroy_auth_data(sdata, false);
3647                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3648                                       IEEE80211_DEAUTH_FRAME_LEN);
3649         }
3650
3651         sdata_unlock(sdata);
3652 }
3653
3654 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3655 {
3656         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3657
3658         sdata_lock(sdata);
3659         if (!ifmgd->associated) {
3660                 sdata_unlock(sdata);
3661                 return;
3662         }
3663
3664         if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3665                 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3666                 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3667                 ieee80211_sta_connection_lost(sdata,
3668                                               ifmgd->associated->bssid,
3669                                               WLAN_REASON_UNSPECIFIED,
3670                                               true);
3671                 sdata_unlock(sdata);
3672                 return;
3673         }
3674         sdata_unlock(sdata);
3675 }
3676 #endif
3677
3678 /* interface setup */
3679 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3680 {
3681         struct ieee80211_if_managed *ifmgd;
3682
3683         ifmgd = &sdata->u.mgd;
3684         INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3685         INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3686         INIT_WORK(&ifmgd->beacon_connection_loss_work,
3687                   ieee80211_beacon_connection_loss_work);
3688         INIT_WORK(&ifmgd->csa_connection_drop_work,
3689                   ieee80211_csa_connection_drop_work);
3690         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
3691         setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3692                     (unsigned long) sdata);
3693         setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3694                     (unsigned long) sdata);
3695         setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3696                     (unsigned long) sdata);
3697         setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3698                     (unsigned long) sdata);
3699
3700         ifmgd->flags = 0;
3701         ifmgd->powersave = sdata->wdev.ps;
3702         ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3703         ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3704         ifmgd->p2p_noa_index = -1;
3705
3706         if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3707                 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3708         else
3709                 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3710 }
3711
3712 /* scan finished notification */
3713 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3714 {
3715         struct ieee80211_sub_if_data *sdata;
3716
3717         /* Restart STA timers */
3718         rcu_read_lock();
3719         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3720                 if (ieee80211_sdata_running(sdata))
3721                         ieee80211_restart_sta_timer(sdata);
3722         }
3723         rcu_read_unlock();
3724 }
3725
3726 int ieee80211_max_network_latency(struct notifier_block *nb,
3727                                   unsigned long data, void *dummy)
3728 {
3729         s32 latency_usec = (s32) data;
3730         struct ieee80211_local *local =
3731                 container_of(nb, struct ieee80211_local,
3732                              network_latency_notifier);
3733
3734         mutex_lock(&local->iflist_mtx);
3735         ieee80211_recalc_ps(local, latency_usec);
3736         mutex_unlock(&local->iflist_mtx);
3737
3738         return NOTIFY_OK;
3739 }
3740
3741 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3742                                      struct cfg80211_bss *cbss)
3743 {
3744         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3745         const u8 *ht_cap_ie, *vht_cap_ie;
3746         const struct ieee80211_ht_cap *ht_cap;
3747         const struct ieee80211_vht_cap *vht_cap;
3748         u8 chains = 1;
3749
3750         if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3751                 return chains;
3752
3753         ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3754         if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3755                 ht_cap = (void *)(ht_cap_ie + 2);
3756                 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3757                 /*
3758                  * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3759                  *       "Tx Unequal Modulation Supported" fields.
3760                  */
3761         }
3762
3763         if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3764                 return chains;
3765
3766         vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3767         if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3768                 u8 nss;
3769                 u16 tx_mcs_map;
3770
3771                 vht_cap = (void *)(vht_cap_ie + 2);
3772                 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3773                 for (nss = 8; nss > 0; nss--) {
3774                         if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3775                                         IEEE80211_VHT_MCS_NOT_SUPPORTED)
3776                                 break;
3777                 }
3778                 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3779                 chains = max(chains, nss);
3780         }
3781
3782         return chains;
3783 }
3784
3785 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3786                                   struct cfg80211_bss *cbss)
3787 {
3788         struct ieee80211_local *local = sdata->local;
3789         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3790         const struct ieee80211_ht_operation *ht_oper = NULL;
3791         const struct ieee80211_vht_operation *vht_oper = NULL;
3792         struct ieee80211_supported_band *sband;
3793         struct cfg80211_chan_def chandef;
3794         int ret;
3795
3796         sband = local->hw.wiphy->bands[cbss->channel->band];
3797
3798         ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3799                           IEEE80211_STA_DISABLE_80P80MHZ |
3800                           IEEE80211_STA_DISABLE_160MHZ);
3801
3802         rcu_read_lock();
3803
3804         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3805             sband->ht_cap.ht_supported) {
3806                 const u8 *ht_oper_ie, *ht_cap;
3807
3808                 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3809                 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3810                         ht_oper = (void *)(ht_oper_ie + 2);
3811
3812                 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3813                 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3814                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3815                         ht_oper = NULL;
3816                 }
3817         }
3818
3819         if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3820             sband->vht_cap.vht_supported) {
3821                 const u8 *vht_oper_ie, *vht_cap;
3822
3823                 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3824                                                    WLAN_EID_VHT_OPERATION);
3825                 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3826                         vht_oper = (void *)(vht_oper_ie + 2);
3827                 if (vht_oper && !ht_oper) {
3828                         vht_oper = NULL;
3829                         sdata_info(sdata,
3830                                    "AP advertised VHT without HT, disabling both\n");
3831                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3832                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3833                 }
3834
3835                 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3836                 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3837                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3838                         vht_oper = NULL;
3839                 }
3840         }
3841
3842         ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3843                                                      cbss->channel,
3844                                                      ht_oper, vht_oper,
3845                                                      &chandef, false);
3846
3847         sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3848                                       local->rx_chains);
3849
3850         rcu_read_unlock();
3851
3852         /* will change later if needed */
3853         sdata->smps_mode = IEEE80211_SMPS_OFF;
3854
3855         mutex_lock(&local->mtx);
3856         /*
3857          * If this fails (possibly due to channel context sharing
3858          * on incompatible channels, e.g. 80+80 and 160 sharing the
3859          * same control channel) try to use a smaller bandwidth.
3860          */
3861         ret = ieee80211_vif_use_channel(sdata, &chandef,
3862                                         IEEE80211_CHANCTX_SHARED);
3863
3864         /* don't downgrade for 5 and 10 MHz channels, though. */
3865         if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3866             chandef.width == NL80211_CHAN_WIDTH_10)
3867                 goto out;
3868
3869         while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3870                 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
3871                 ret = ieee80211_vif_use_channel(sdata, &chandef,
3872                                                 IEEE80211_CHANCTX_SHARED);
3873         }
3874  out:
3875         mutex_unlock(&local->mtx);
3876         return ret;
3877 }
3878
3879 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3880                                      struct cfg80211_bss *cbss, bool assoc)
3881 {
3882         struct ieee80211_local *local = sdata->local;
3883         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3884         struct ieee80211_bss *bss = (void *)cbss->priv;
3885         struct sta_info *new_sta = NULL;
3886         bool have_sta = false;
3887         int err;
3888
3889         if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3890                 return -EINVAL;
3891
3892         if (assoc) {
3893                 rcu_read_lock();
3894                 have_sta = sta_info_get(sdata, cbss->bssid);
3895                 rcu_read_unlock();
3896         }
3897
3898         if (!have_sta) {
3899                 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3900                 if (!new_sta)
3901                         return -ENOMEM;
3902         }
3903         if (new_sta) {
3904                 u32 rates = 0, basic_rates = 0;
3905                 bool have_higher_than_11mbit;
3906                 int min_rate = INT_MAX, min_rate_index = -1;
3907                 struct ieee80211_chanctx_conf *chanctx_conf;
3908                 struct ieee80211_supported_band *sband;
3909                 const struct cfg80211_bss_ies *ies;
3910                 int shift;
3911                 u32 rate_flags;
3912
3913                 sband = local->hw.wiphy->bands[cbss->channel->band];
3914
3915                 err = ieee80211_prep_channel(sdata, cbss);
3916                 if (err) {
3917                         sta_info_free(local, new_sta);
3918                         return -EINVAL;
3919                 }
3920                 shift = ieee80211_vif_get_shift(&sdata->vif);
3921
3922                 rcu_read_lock();
3923                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3924                 if (WARN_ON(!chanctx_conf)) {
3925                         rcu_read_unlock();
3926                         sta_info_free(local, new_sta);
3927                         return -EINVAL;
3928                 }
3929                 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3930                 rcu_read_unlock();
3931
3932                 ieee80211_get_rates(sband, bss->supp_rates,
3933                                     bss->supp_rates_len,
3934                                     &rates, &basic_rates,
3935                                     &have_higher_than_11mbit,
3936                                     &min_rate, &min_rate_index,
3937                                     shift, rate_flags);
3938
3939                 /*
3940                  * This used to be a workaround for basic rates missing
3941                  * in the association response frame. Now that we no
3942                  * longer use the basic rates from there, it probably
3943                  * doesn't happen any more, but keep the workaround so
3944                  * in case some *other* APs are buggy in different ways
3945                  * we can connect -- with a warning.
3946                  */
3947                 if (!basic_rates && min_rate_index >= 0) {
3948                         sdata_info(sdata,
3949                                    "No basic rates, using min rate instead\n");
3950                         basic_rates = BIT(min_rate_index);
3951                 }
3952
3953                 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3954                 sdata->vif.bss_conf.basic_rates = basic_rates;
3955
3956                 /* cf. IEEE 802.11 9.2.12 */
3957                 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3958                     have_higher_than_11mbit)
3959                         sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3960                 else
3961                         sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3962
3963                 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3964
3965                 /* set timing information */
3966                 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3967                 rcu_read_lock();
3968                 ies = rcu_dereference(cbss->beacon_ies);
3969                 if (ies) {
3970                         const u8 *tim_ie;
3971
3972                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3973                         sdata->vif.bss_conf.sync_device_ts =
3974                                 bss->device_ts_beacon;
3975                         tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3976                                                   ies->data, ies->len);
3977                         if (tim_ie && tim_ie[1] >= 2)
3978                                 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3979                         else
3980                                 sdata->vif.bss_conf.sync_dtim_count = 0;
3981                 } else if (!(local->hw.flags &
3982                                         IEEE80211_HW_TIMING_BEACON_ONLY)) {
3983                         ies = rcu_dereference(cbss->proberesp_ies);
3984                         /* must be non-NULL since beacon IEs were NULL */
3985                         sdata->vif.bss_conf.sync_tsf = ies->tsf;
3986                         sdata->vif.bss_conf.sync_device_ts =
3987                                 bss->device_ts_presp;
3988                         sdata->vif.bss_conf.sync_dtim_count = 0;
3989                 } else {
3990                         sdata->vif.bss_conf.sync_tsf = 0;
3991                         sdata->vif.bss_conf.sync_device_ts = 0;
3992                         sdata->vif.bss_conf.sync_dtim_count = 0;
3993                 }
3994                 rcu_read_unlock();
3995
3996                 /* tell driver about BSSID, basic rates and timing */
3997                 ieee80211_bss_info_change_notify(sdata,
3998                         BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3999                         BSS_CHANGED_BEACON_INT);
4000
4001                 if (assoc)
4002                         sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4003
4004                 err = sta_info_insert(new_sta);
4005                 new_sta = NULL;
4006                 if (err) {
4007                         sdata_info(sdata,
4008                                    "failed to insert STA entry for the AP (error %d)\n",
4009                                    err);
4010                         return err;
4011                 }
4012         } else
4013                 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4014
4015         return 0;
4016 }
4017
4018 /* config hooks */
4019 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4020                        struct cfg80211_auth_request *req)
4021 {
4022         struct ieee80211_local *local = sdata->local;
4023         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4024         struct ieee80211_mgd_auth_data *auth_data;
4025         u16 auth_alg;
4026         int err;
4027
4028         /* prepare auth data structure */
4029
4030         switch (req->auth_type) {
4031         case NL80211_AUTHTYPE_OPEN_SYSTEM:
4032                 auth_alg = WLAN_AUTH_OPEN;
4033                 break;
4034         case NL80211_AUTHTYPE_SHARED_KEY:
4035                 if (IS_ERR(local->wep_tx_tfm))
4036                         return -EOPNOTSUPP;
4037                 auth_alg = WLAN_AUTH_SHARED_KEY;
4038                 break;
4039         case NL80211_AUTHTYPE_FT:
4040                 auth_alg = WLAN_AUTH_FT;
4041                 break;
4042         case NL80211_AUTHTYPE_NETWORK_EAP:
4043                 auth_alg = WLAN_AUTH_LEAP;
4044                 break;
4045         case NL80211_AUTHTYPE_SAE:
4046                 auth_alg = WLAN_AUTH_SAE;
4047                 break;
4048         default:
4049                 return -EOPNOTSUPP;
4050         }
4051
4052         auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4053                             req->ie_len, GFP_KERNEL);
4054         if (!auth_data)
4055                 return -ENOMEM;
4056
4057         auth_data->bss = req->bss;
4058
4059         if (req->sae_data_len >= 4) {
4060                 __le16 *pos = (__le16 *) req->sae_data;
4061                 auth_data->sae_trans = le16_to_cpu(pos[0]);
4062                 auth_data->sae_status = le16_to_cpu(pos[1]);
4063                 memcpy(auth_data->data, req->sae_data + 4,
4064                        req->sae_data_len - 4);
4065                 auth_data->data_len += req->sae_data_len - 4;
4066         }
4067
4068         if (req->ie && req->ie_len) {
4069                 memcpy(&auth_data->data[auth_data->data_len],
4070                        req->ie, req->ie_len);
4071                 auth_data->data_len += req->ie_len;
4072         }
4073
4074         if (req->key && req->key_len) {
4075                 auth_data->key_len = req->key_len;
4076                 auth_data->key_idx = req->key_idx;
4077                 memcpy(auth_data->key, req->key, req->key_len);
4078         }
4079
4080         auth_data->algorithm = auth_alg;
4081
4082         /* try to authenticate/probe */
4083
4084         if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4085             ifmgd->assoc_data) {
4086                 err = -EBUSY;
4087                 goto err_free;
4088         }
4089
4090         if (ifmgd->auth_data)
4091                 ieee80211_destroy_auth_data(sdata, false);
4092
4093         /* prep auth_data so we don't go into idle on disassoc */
4094         ifmgd->auth_data = auth_data;
4095
4096         if (ifmgd->associated) {
4097                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4098
4099                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4100                                        WLAN_REASON_UNSPECIFIED,
4101                                        false, frame_buf);
4102
4103                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4104                                       sizeof(frame_buf));
4105         }
4106
4107         sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4108
4109         err = ieee80211_prep_connection(sdata, req->bss, false);
4110         if (err)
4111                 goto err_clear;
4112
4113         err = ieee80211_probe_auth(sdata);
4114         if (err) {
4115                 sta_info_destroy_addr(sdata, req->bss->bssid);
4116                 goto err_clear;
4117         }
4118
4119         /* hold our own reference */
4120         cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4121         return 0;
4122
4123  err_clear:
4124         memset(ifmgd->bssid, 0, ETH_ALEN);
4125         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4126         ifmgd->auth_data = NULL;
4127  err_free:
4128         kfree(auth_data);
4129         return err;
4130 }
4131
4132 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4133                                         const u8 *wmm_param, int len)
4134 {
4135         const u8 *pos;
4136         size_t left;
4137
4138         if (len < 8)
4139                 return false;
4140
4141         if (wmm_param[5] != 1 /* version */)
4142                 return false;
4143
4144         pos = wmm_param + 8;
4145         left = len - 8;
4146
4147         for (; left >= 4; left -= 4, pos += 4) {
4148                 u8 aifsn = pos[0] & 0x0f;
4149                 u8 ecwmin = pos[1] & 0x0f;
4150                 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4151                 int aci = (pos[0] >> 5) & 0x03;
4152
4153                 if (aifsn < 2) {
4154                         sdata_info(sdata,
4155                                    "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4156                                    aifsn, aci);
4157                         return false;
4158                 }
4159                 if (ecwmin > ecwmax) {
4160                         sdata_info(sdata,
4161                                    "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4162                                    ecwmin, ecwmax, aci);
4163                         return false;
4164                 }
4165         }
4166
4167         return true;
4168 }
4169
4170 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4171                         struct cfg80211_assoc_request *req)
4172 {
4173         struct ieee80211_local *local = sdata->local;
4174         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4175         struct ieee80211_bss *bss = (void *)req->bss->priv;
4176         struct ieee80211_mgd_assoc_data *assoc_data;
4177         const struct cfg80211_bss_ies *beacon_ies;
4178         struct ieee80211_supported_band *sband;
4179         const u8 *ssidie, *ht_ie, *vht_ie;
4180         int i, err;
4181
4182         assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4183         if (!assoc_data)
4184                 return -ENOMEM;
4185
4186         rcu_read_lock();
4187         ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4188         if (!ssidie) {
4189                 rcu_read_unlock();
4190                 kfree(assoc_data);
4191                 return -EINVAL;
4192         }
4193         memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4194         assoc_data->ssid_len = ssidie[1];
4195         rcu_read_unlock();
4196
4197         if (ifmgd->associated) {
4198                 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4199
4200                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4201                                        WLAN_REASON_UNSPECIFIED,
4202                                        false, frame_buf);
4203
4204                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4205                                       sizeof(frame_buf));
4206         }
4207
4208         if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4209                 err = -EBUSY;
4210                 goto err_free;
4211         }
4212
4213         if (ifmgd->assoc_data) {
4214                 err = -EBUSY;
4215                 goto err_free;
4216         }
4217
4218         if (ifmgd->auth_data) {
4219                 bool match;
4220
4221                 /* keep sta info, bssid if matching */
4222                 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4223                 ieee80211_destroy_auth_data(sdata, match);
4224         }
4225
4226         /* prepare assoc data */
4227
4228         ifmgd->beacon_crc_valid = false;
4229
4230         assoc_data->wmm = bss->wmm_used &&
4231                           (local->hw.queues >= IEEE80211_NUM_ACS);
4232         if (assoc_data->wmm) {
4233                 /* try to check validity of WMM params IE */
4234                 const struct cfg80211_bss_ies *ies;
4235                 const u8 *wp, *start, *end;
4236
4237                 rcu_read_lock();
4238                 ies = rcu_dereference(req->bss->ies);
4239                 start = ies->data;
4240                 end = start + ies->len;
4241
4242                 while (true) {
4243                         wp = cfg80211_find_vendor_ie(
4244                                 WLAN_OUI_MICROSOFT,
4245                                 WLAN_OUI_TYPE_MICROSOFT_WMM,
4246                                 start, end - start);
4247                         if (!wp)
4248                                 break;
4249                         start = wp + wp[1] + 2;
4250                         /* if this IE is too short, try the next */
4251                         if (wp[1] <= 4)
4252                                 continue;
4253                         /* if this IE is WMM params, we found what we wanted */
4254                         if (wp[6] == 1)
4255                                 break;
4256                 }
4257
4258                 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4259                                                         wp[1] - 2)) {
4260                         assoc_data->wmm = false;
4261                         ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4262                 }
4263                 rcu_read_unlock();
4264         }
4265
4266         /*
4267          * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4268          * We still associate in non-HT mode (11a/b/g) if any one of these
4269          * ciphers is configured as pairwise.
4270          * We can set this to true for non-11n hardware, that'll be checked
4271          * separately along with the peer capabilities.
4272          */
4273         for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4274                 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4275                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4276                     req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4277                         ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4278                         ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4279                         netdev_info(sdata->dev,
4280                                     "disabling HT/VHT due to WEP/TKIP use\n");
4281                 }
4282         }
4283
4284         if (req->flags & ASSOC_REQ_DISABLE_HT) {
4285                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4286                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4287         }
4288
4289         if (req->flags & ASSOC_REQ_DISABLE_VHT)
4290                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4291
4292         /* Also disable HT if we don't support it or the AP doesn't use WMM */
4293         sband = local->hw.wiphy->bands[req->bss->channel->band];
4294         if (!sband->ht_cap.ht_supported ||
4295             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4296             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4297                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4298                 if (!bss->wmm_used &&
4299                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4300                         netdev_info(sdata->dev,
4301                                     "disabling HT as WMM/QoS is not supported by the AP\n");
4302         }
4303
4304         /* disable VHT if we don't support it or the AP doesn't use WMM */
4305         if (!sband->vht_cap.vht_supported ||
4306             local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4307             ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4308                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4309                 if (!bss->wmm_used &&
4310                     !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4311                         netdev_info(sdata->dev,
4312                                     "disabling VHT as WMM/QoS is not supported by the AP\n");
4313         }
4314
4315         memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4316         memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4317                sizeof(ifmgd->ht_capa_mask));
4318
4319         memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4320         memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4321                sizeof(ifmgd->vht_capa_mask));
4322
4323         if (req->ie && req->ie_len) {
4324                 memcpy(assoc_data->ie, req->ie, req->ie_len);
4325                 assoc_data->ie_len = req->ie_len;
4326         }
4327
4328         assoc_data->bss = req->bss;
4329
4330         if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4331                 if (ifmgd->powersave)
4332                         sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4333                 else
4334                         sdata->smps_mode = IEEE80211_SMPS_OFF;
4335         } else
4336                 sdata->smps_mode = ifmgd->req_smps;
4337
4338         assoc_data->capability = req->bss->capability;
4339         assoc_data->supp_rates = bss->supp_rates;
4340         assoc_data->supp_rates_len = bss->supp_rates_len;
4341
4342         rcu_read_lock();
4343         ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4344         if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4345                 assoc_data->ap_ht_param =
4346                         ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4347         else
4348                 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4349         vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4350         if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4351                 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4352                        sizeof(struct ieee80211_vht_cap));
4353         else
4354                 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4355         rcu_read_unlock();
4356
4357         if (bss->wmm_used && bss->uapsd_supported &&
4358             (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4359             sdata->wmm_acm != 0xff) {
4360                 assoc_data->uapsd = true;
4361                 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4362         } else {
4363                 assoc_data->uapsd = false;
4364                 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4365         }
4366
4367         if (req->prev_bssid)
4368                 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4369
4370         if (req->use_mfp) {
4371                 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4372                 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4373         } else {
4374                 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4375                 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4376         }
4377
4378         if (req->crypto.control_port)
4379                 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4380         else
4381                 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4382
4383         sdata->control_port_protocol = req->crypto.control_port_ethertype;
4384         sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4385         sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4386                                                         sdata->vif.type);
4387
4388         /* kick off associate process */
4389
4390         ifmgd->assoc_data = assoc_data;
4391         ifmgd->dtim_period = 0;
4392         ifmgd->have_beacon = false;
4393
4394         err = ieee80211_prep_connection(sdata, req->bss, true);
4395         if (err)
4396                 goto err_clear;
4397
4398         rcu_read_lock();
4399         beacon_ies = rcu_dereference(req->bss->beacon_ies);
4400
4401         if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4402             !beacon_ies) {
4403                 /*
4404                  * Wait up to one beacon interval ...
4405                  * should this be more if we miss one?
4406                  */
4407                 sdata_info(sdata, "waiting for beacon from %pM\n",
4408                            ifmgd->bssid);
4409                 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4410                 assoc_data->timeout_started = true;
4411                 assoc_data->need_beacon = true;
4412         } else if (beacon_ies) {
4413                 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4414                                                     beacon_ies->data,
4415                                                     beacon_ies->len);
4416                 u8 dtim_count = 0;
4417
4418                 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4419                         const struct ieee80211_tim_ie *tim;
4420                         tim = (void *)(tim_ie + 2);
4421                         ifmgd->dtim_period = tim->dtim_period;
4422                         dtim_count = tim->dtim_count;
4423                 }
4424                 ifmgd->have_beacon = true;
4425                 assoc_data->timeout = jiffies;
4426                 assoc_data->timeout_started = true;
4427
4428                 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4429                         sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4430                         sdata->vif.bss_conf.sync_device_ts =
4431                                 bss->device_ts_beacon;
4432                         sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4433                 }
4434         } else {
4435                 assoc_data->timeout = jiffies;
4436                 assoc_data->timeout_started = true;
4437         }
4438         rcu_read_unlock();
4439
4440         run_again(sdata, assoc_data->timeout);
4441
4442         if (bss->corrupt_data) {
4443                 char *corrupt_type = "data";
4444                 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4445                         if (bss->corrupt_data &
4446                                         IEEE80211_BSS_CORRUPT_PROBE_RESP)
4447                                 corrupt_type = "beacon and probe response";
4448                         else
4449                                 corrupt_type = "beacon";
4450                 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4451                         corrupt_type = "probe response";
4452                 sdata_info(sdata, "associating with AP with corrupt %s\n",
4453                            corrupt_type);
4454         }
4455
4456         return 0;
4457  err_clear:
4458         memset(ifmgd->bssid, 0, ETH_ALEN);
4459         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4460         ifmgd->assoc_data = NULL;
4461  err_free:
4462         kfree(assoc_data);
4463         return err;
4464 }
4465
4466 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4467                          struct cfg80211_deauth_request *req)
4468 {
4469         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4470         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4471         bool tx = !req->local_state_change;
4472
4473         if (ifmgd->auth_data &&
4474             ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4475                 sdata_info(sdata,
4476                            "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4477                            req->bssid, req->reason_code,
4478                            ieee80211_get_reason_code_string(req->reason_code));
4479
4480                 drv_mgd_prepare_tx(sdata->local, sdata);
4481                 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4482                                                IEEE80211_STYPE_DEAUTH,
4483                                                req->reason_code, tx,
4484                                                frame_buf);
4485                 ieee80211_destroy_auth_data(sdata, false);
4486                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4487                                       IEEE80211_DEAUTH_FRAME_LEN);
4488
4489                 return 0;
4490         }
4491
4492         if (ifmgd->associated &&
4493             ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4494                 sdata_info(sdata,
4495                            "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4496                            req->bssid, req->reason_code,
4497                            ieee80211_get_reason_code_string(req->reason_code));
4498
4499                 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4500                                        req->reason_code, tx, frame_buf);
4501                 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4502                                       IEEE80211_DEAUTH_FRAME_LEN);
4503                 return 0;
4504         }
4505
4506         return -ENOTCONN;
4507 }
4508
4509 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4510                            struct cfg80211_disassoc_request *req)
4511 {
4512         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4513         u8 bssid[ETH_ALEN];
4514         u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4515
4516         /*
4517          * cfg80211 should catch this ... but it's racy since
4518          * we can receive a disassoc frame, process it, hand it
4519          * to cfg80211 while that's in a locked section already
4520          * trying to tell us that the user wants to disconnect.
4521          */
4522         if (ifmgd->associated != req->bss)
4523                 return -ENOLINK;
4524
4525         sdata_info(sdata,
4526                    "disassociating from %pM by local choice (Reason: %u=%s)\n",
4527                    req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4528
4529         memcpy(bssid, req->bss->bssid, ETH_ALEN);
4530         ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4531                                req->reason_code, !req->local_state_change,
4532                                frame_buf);
4533
4534         cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4535                               IEEE80211_DEAUTH_FRAME_LEN);
4536
4537         return 0;
4538 }
4539
4540 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4541 {
4542         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4543
4544         /*
4545          * Make sure some work items will not run after this,
4546          * they will not do anything but might not have been
4547          * cancelled when disconnecting.
4548          */
4549         cancel_work_sync(&ifmgd->monitor_work);
4550         cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4551         cancel_work_sync(&ifmgd->request_smps_work);
4552         cancel_work_sync(&ifmgd->csa_connection_drop_work);
4553         cancel_work_sync(&ifmgd->chswitch_work);
4554
4555         sdata_lock(sdata);
4556         if (ifmgd->assoc_data) {
4557                 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4558                 ieee80211_destroy_assoc_data(sdata, false);
4559                 cfg80211_assoc_timeout(sdata->dev, bss);
4560         }
4561         if (ifmgd->auth_data)
4562                 ieee80211_destroy_auth_data(sdata, false);
4563         del_timer_sync(&ifmgd->timer);
4564         sdata_unlock(sdata);
4565 }
4566
4567 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4568                                enum nl80211_cqm_rssi_threshold_event rssi_event,
4569                                gfp_t gfp)
4570 {
4571         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4572
4573         trace_api_cqm_rssi_notify(sdata, rssi_event);
4574
4575         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4576 }
4577 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);